2aHawaii
General Topics => General Discussion => Topic started by: rklapp on August 13, 2017, 08:18:08 PM
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I've been having bump fire issues with my AR lower and Fed SR Match primers. I'm on my second box of Fed primers and this started to happen a month ago with both the 5.56 and 300BLK uppers. I have been getting into hotter loads lately but can't determine a direct correlation. The going theory is that the Fed primers are soft and more susceptible to bump fires. I was planning to switch to CCI 41 primers and then saw that Johnny was having a similar problem. Fortunately, I didn't shoot out my camera tripod like he did (not that I use one).
https://youtu.be/7Il1ix-E_cA?t=6m49s
I stopped by Prime Sports and noticed he had Winchester primers but didn't get any. Are they as soft as Feds?
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Bump fire or slam fire?
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http://www.youtube.com/watch?v=yA9WhYnsD_4&spfreload=10
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I've never had a slam fire. Slam fire is when the bolt and firing pin go forward and set off a round without pressing the trigger. Bump fire is when you have a stock or hold the rifle a certain way to replicate full-auto with a semi-auto.
Everything stock and unmodified?
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Had Fed primers pierce several times but not a slam fire. Lee Precision states not to use Federal in their priming tools.
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Truth is I'm not sure to call it a slam or bump. Regardless, it's where the free floating pin hits the primer when returning the BCG. I installed a 2.5# trigger. If the problem persists with the CCI primers, then I'll switch back to the stock trigger. Is it possible for the trigger to cause primer problems? How?
I can see how the Fed primers could be a problem. Ironically, they were the most accurate and the highest velocity SD of the group.
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You need to troubleshoot further. Is it your trigger or your reloads? That Johnny video shows a possible trigger problem. Several things contribute to a slam fire. A high primer. Possibly a very sensitive primer (Federal). Johnny's troubleshooting is all over the place in that video. He blames the primers and talks about all kinds of factors that are likely not relevant to the problem he experienced. Anyways my 1.5 cents
http://www.youtube.com/watch?v=S6nE5wSpks4
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He'll likely troubleshoot it further tomorrow. He makes several videos in a day, then spends the following days releasing each video. Today was part two of 223 primers, not that there's much difference. I'm sitting in the Kauai airport so will check out the video when I get home.
It's likely the trigger or the primer. I'm planning to head to range on Thursday
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Truth is I'm not sure to call it a slam or bump. Regardless, it's where the free floating pin hits the primer when returning the BCG. I installed a 2.5# trigger. If the problem persists with the CCI primers, then I'll switch back to the stock trigger. Is it possible for the trigger to cause primer problems? How?
I can see how the Fed primers could be a problem. Ironically, they were the most accurate and the highest velocity SD of the group.
Does it do this when you send the bolt home (if loading on an open bolt) or when you pull the charging handle to chamber the first round? If it does it then, it's a slam fire.
Or is the gun firing off a second shot after a single pull of the trigger? If it's doing this, then there are some trouble shooting that can be done to eliminate variables.
To me, bump firing is holding the gun in such a manner where the recoil impulse sends the gun backwards slightly and then forward pressure on the gun pushes the trigger against the trigger finger, which is held somewhat firm, and then fires off another round. I've seen people do this intentionally often and somewhat to a lesser extent unintentionally.
I've personally never had a slam fire. After unloading, I've often noticed a shallow depression in the primers, which was evidence that the firing pin had hit the primer upon chambering the round, but not enough to ignite the primer.
EDIT: Just watched the video. Not much though, but just the part where the "holy smokes". Tough to tell there as there seemed to be a sort of break, like video editing. However, it appeared that he shot one. Let the trigger reset and he appeared to pull the trigger. In that case, I don't see it as a slam fire as the bolt would already be home. I was thinking maybe the hammer went forward on reset, but after watching it a few times, I didn't see that. I'll go back later tonight and try to watch the trouble shooting part of the video.
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Depends how the round is loaded too. If you're feeding rounds directly into the ejection port with no mag or an empty mag loaded, then there's less resistance when the bolt goes forward. So the bolt/firing pin will hit the primer harder than if it's stripping rounds out of a magazine.
Or could be something wrong with the trigger where it's firing off 2 rounds with one trigger press, but this would affect all different types of primers.
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I have had 2 slam fires using Federal SR Match primers in my AR-15. I stopped using them.
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He'll likely troubleshoot it further tomorrow. He makes several videos in a day, then spends the following days releasing each video. Today was part two of 223 primers, not that there's much difference. I'm sitting in the Kauai airport so will check out the video when I get home.
It's likely the trigger or the primer. I'm planning to head to range on Thursday
What's your relationship with Johnny?
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Does it do this when you send the bolt home (if loading on an open bolt) or when you pull the charging handle to chamber the first round? If it does it then, it's a slam fire.
Or is the gun firing off a second shot after a single pull of the trigger? If it's doing this, then there are some trouble shooting that can be done to eliminate variables.
About every fifth round, a second round usually goes off after I squeeze the trigger, hold, and release the trigger. Sometimes, the rounds go bang-bang but not often. I then have to pull the charging handle a bit to recock the bolt.
I have had 2 slam fires using Federal SR Match primers in my AR-15. I stopped using them.
I agree. That's the consensus. The alternative theory is that the trigger is causing it.
What's your relationship with Johnny?
Um... I thought it was interesting that he started to have the same problem I was having. Why?
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Step by step plan for you to trouble shoot:
- get 100 rounds of factory ammo
- shoot them
- if you get slam fires its your trigger
If everything checks out OK with the factory ammo it is likely your reloaded ammo
- shoot your suspected reloaded ammo - if you get slam fires its your ammo. either the make of your primers are culprit or they could be sticking out of the case (unlikely as the ammo would likely not chamber in an AR)
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Thanks for reminding me. I'll try the PMC Bronze ammo I have.
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http://www.youtube.com/watch?v=yA9WhYnsD_4&spfreload=10
Best post so far, love this song...
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I have a JP fully adjustable trigger in my AR and I apparently had it adjusted incorrectly the first time I took it out. I won't go into all the details but all it took was about 30-40 rounds of crud to get into it and started doing something similar. But once it started it was repeatable. So I suggest you explore the primer issue first and then go for the trigger if the commercial ammo does it as well.
One question. Do you think it fires the second round when you release the trigger? In other words, if you hold the trigger back hard after the shot goes off for a few seconds and then when you release the trigger it fires again?
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I have a JP fully adjustable trigger in my AR and I apparently had it adjusted incorrectly the first time I took it out. I won't go into all the details but all it took was about 30-40 rounds of crud to get into it and started doing something similar. But once it started it was repeatable. So I suggest you explore the primer issue first and then go for the trigger if the commercial ammo does it as well.
One question. Do you think it fires the second round when you release the trigger? In other words, if you hold the trigger back hard after the shot goes off for a few seconds and then when you release the trigger it fires again?
When I watched the video, that's what I suspected. That a second shot was going off on the reset. But then watching the slow mo, it was a double that was so fast that I didn't pick up the second. Hard to tell from the video, but he seemed to be shooting in the click-bang-pause-reset/click method.
I've seen a ton of Glock triggers start doubling when folks start "polishing" certain parts of the trigger assembly. Never really seen it on an AR, but don't doubt that it can happen. I've seen the fire on reset though, but not too often.
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About every fifth round, a second round usually goes off after I squeeze the trigger, hold, and release the trigger. Sometimes, the rounds go bang-bang but not often. I then have to pull the charging handle a bit to recock the bolt.
SNIP
You're getting good advice here.
However, I just wanted to clarify, since you're sort of all over the place.
So it sounds like there are a number of different variations. See if I got this right.
Variation #1 - Click of breaking of trigger - bang - still holding trigger to rear - release trigger - bang (does the second bang occur on the reset?)
Variation #2 - Click of breaking of trigger - bang & bang - still holding trigger to rear - release trigger - dead trigger (bolt is forward, but hammer is not cocked?)
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When I watched the video, that's what I suspected. That a second shot was going off on the reset. But then watching the slow mo, it was a double that was so fast that I didn't pick up the second. Hard to tell from the video, but he seemed to be shooting in the click-bang-pause-reset/click method.
I've seen a ton of Glock triggers start doubling when folks start "polishing" certain parts of the trigger assembly. Never really seen it on an AR, but don't doubt that it can happen. I've seen the fire on reset though, but not too often.
I was not going to get into too much detail, but since we are discussing it....
I really like the JP trigger but it can be adjusted down to the 'nth degree. Which I did a little too much. So after about 30-40 rounds it went full auto!!! :o :o :o Surprised the you know what out of me!!! The RSO's didn't hear it the first time. I took it home and cleaned it and next visit it did the same thing. But this time one of the RSO's was standing within earshot and came over to give me crap about it. I called JP and they admitted it can happen and explained what I had to do to fix it. It was easy enough to adjust but just took a little time and patience.
The scenario I asked RK about in my previous post is something I saw on someone else's AR at the range a couple of years ago. I don't remember what trigger he installed or if he had worked on the trigger himself? Geez my memory is shit lately. Anyway, he was getting double shots almost every time he pulled the trigger. When separating the upper and lower it would not repeat. Once the upper was back on and a magazine inserted with some ammo it would fire one round when pulled and another when released most of the time. Took me a while to figure it out for him. I originally thought I was double tapping the trigger unknowingly.
I am a fairly new AR owner. Since 2012. I jumped into reloading for it without a whole lot of research. I loaded a couple thousand rounds of .223 using Federal primers before I heard about them being soft enough to allow a slam fire. I have probably put 600-800 rounds through it without a slam fire. I know this proves nothing, but I have since purchased harder primers for reloading for my AR just in case. I still have about 1,500 to shoot up with the Federal primers. I can use up the remaining Federals with my bolt gun. Personally, I will never use Federal primers again as they are slightly larger in diameter than say CCI's and take a lot more effort on my hand primer to press them in place. And with arthritis setting in it means more pain and less reloading per day for me.
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I really like the JP trigger but it can be adjusted down to the 'nth degree. Which I did a little too much. So after about 30-40 rounds it went full auto!!! :o :o :o Surprised the you know what out of me!!!
More reasons for the 5rnd mag limit.
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More reasons for the 5rnd mag limit.
I would prefer to empty a 30 round mag full auto. :rofl: :rofl: :rofl:
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I was not going to get into too much detail, but since we are discussing it....
SNIP
Thank you for going into that! Always good information. :thumbsup:
While you may be "new" to ARs, I bet you've seen quite a lot with the frequency you shoot and with your buddies. While I have shot thousands of rounds, my guns are pretty vanilla. I'm not really into mods, particularly triggers and I shoot only factory ammo. That eliminates, or at least reduces a number of "variable gremlins". I have shooting buddies who absolutely LOVE to tweak this, or tweak that. One in particular also reloads and loves to tweak stuff there as well. Well, shooting matches and in training, he was getting various malfunctions. One was eventually found to be too light a trigger spring, but that took a bunch of my factory ammo to rule out primer issues on his reloads. Then his homemade holsters were hitting the mag release, so the mag would unseat upon draw or even come flying out of the gun on the draw. It was actually kind of funny at times to see the mag go flying out. I mean, I mostly don't mess with that stuff due to time and I definitely don't look down on him for his experimentations. Just that I've also some to realize that with that experimentation comes a lot of troubleshooting and doubt entering into the equation.
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Thank you for going into that! Always good information. :thumbsup:
While you may be "new" to ARs, I bet you've seen quite a lot with the frequency you shoot and with your buddies. While I have shot thousands of rounds, my guns are pretty vanilla. I'm not really into mods, particularly triggers and I shoot only factory ammo. That eliminates, or at least reduces a number of "variable gremlins". I have shooting buddies who absolutely LOVE to tweak this, or tweak that. One in particular also reloads and loves to tweak stuff there as well. Well, shooting matches and in training, he was getting various malfunctions. One was eventually found to be too light a trigger spring, but that took a bunch of my factory ammo to rule out primer issues on his reloads. Then his homemade holsters were hitting the mag release, so the mag would unseat upon draw or even come flying out of the gun on the draw. It was actually kind of funny at times to see the mag go flying out. I mean, I mostly don't mess with that stuff due to time and I definitely don't look down on him for his experimentations. Just that I've also some to realize that with that experimentation comes a lot of troubleshooting and doubt entering into the equation.
I have had steadfast rule for myself over the years. And that is that I can mod/tweak whatever on any gun in my collection except my self defense gun(s). In which case I use only factory ammo and a stock (unmolested) revolver. I test the two every couple of years and rotate in new ammo. In my mind this combination is about as reliable, maintenance free and as a repeatable combination there is.
As far as the mag popping out, I have modded my Glock with an extended mag release so I don't have to reposition the gun in my hand in order to drop a mag. And it works in my holster just fine. My problem came about when I first got it I would shoot with my thumb touching the side of the mag release. And while shooting the mag would just mysteriously drop out. At first I thought I had adjusted it so the mag was not held in securely under fire. But after a little testing I found it was due to operator error. :oops: :oops: :oops:
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Variation #1 - Click of breaking of trigger - bang - still holding trigger to rear - release trigger - bang (does the second bang occur on the reset?)
Variation #2 - Click of breaking of trigger - bang & bang - still holding trigger to rear - release trigger - dead trigger (bolt is forward, but hammer is not cocked?)
I would say 1 but can't rule out 2 based of my recollection of events. Usually 1 happens and I have to recock the next round by pulling back the charging handle a bit without ejecting the next round.
It's difficult to determine which in Johnny's video because he's filming at 30 fps and the slam fire can happen between frames.
I'll play with it Thursday using ren's plan. If it happens with the PMC ammo, then I'll reinstall the stiffer trigger spring. If it happens with the Fed primers I previously loaded, then I'll switch to CCI 400 or something.
I very much appreciate all of the advice.
Then his homemade holsters were hitting the mag release, so the mag would unseat upon draw or even come flying out of the gun on the draw. It was actually kind of funny at times to see the mag go flying out.
That's an old cliche in many comedy western movies but never thought it could actually happen.
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If you say that you have to recock the hammer after the double, then I would say you may have a problem with sear engagement.
Wouldn't rule out soft fed primers. They are known to have issues in ARs.
Maybe, (rifle completely unloaded pointed in a safe direction no ammo anywhere around, yadayada) you could cycle it by hand, letting the bolt slam home, and see if the trigger resets every time, or if the hammer falls home without you re-pulling the trigger, to see if your hammer is falling off the sear?
Maybe check carefully down in the trigger group, to see if there is any crud or burrs that might be effecting proper function?
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If you say that you have to recock the hammer after the double, then I would say you may have a problem with sear engagement.
Wouldn't rule out soft fed primers. They are known to have issues in ARs.
Maybe, (rifle completely unloaded pointed in a safe direction no ammo anywhere around, yadayada) you could cycle it by hand, letting the bolt slam home, and see if the trigger resets every time, or if the hammer falls home without you re-pulling the trigger, to see if your hammer is falling off the sear?
Maybe check carefully down in the trigger group, to see if there is any crud or burrs that might be effecting proper function?
Appreciate the advice. I haven't had any issues with the trigger except during the slam fires. It's all cleaned out. My guess is that it's a combination of light trigger spring and soft primer. I'll find out Thursday at the range. I plan to be there early to set up my new chrono.
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I have had steadfast rule for myself over the years. And that is that I can mod/tweak whatever on any gun in my collection except my self defense gun(s). In which case I use only factory ammo and a stock (unmolested) revolver. I test the two every couple of years and rotate in new ammo. In my mind this combination is about as reliable, maintenance free and as a repeatable combination there is.
As far as the mag popping out, I have modded my Glock with an extended mag release so I don't have to reposition the gun in my hand in order to drop a mag. And it works in my holster just fine. My problem came about when I first got it I would shoot with my thumb touching the side of the mag release. And while shooting the mag would just mysteriously drop out. At first I thought I had adjusted it so the mag was not held in securely under fire. But after a little testing I found it was due to operator error. :oops: :oops: :oops:
For guns for defense, I'm pretty close to the same. I've done minor tweaks on my Glock 17s. Sights, mag release, and slide stop. They have a grip plug, but I could do without those. I've played around with the disconnect on my Glock 34, but that's pretty much only for competition. Not sure I like that enough where I would consider changing on my 17s. For the most part, I tend to stay away from trigger stuff on defensive guns, including my ARs. Reliability is the main consideration here and I am more concerned that my "bubba'ing" of stuff will have things malfunctioning like my "mod happy" shooting friend. I tend to not like having more questions when I am at the range.
I've seen people inadvertently have their thumbs on the slide stop/release, but not the mag release. You must be special. ;D
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I've seen people inadvertently have their thumbs on the slide stop/release, but not the mag release. You must be special. ;D
I have long fingers. I'll let you infer whatever you want from that... :P :P :P
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I have long fingers. I'll let you infer whatever you want from that... :P :P :P
That you're trying to justify why your "tools" feel smaller in your hands???
:rofl: :rofl: :rofl:
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Appreciate the advice. I haven't had any issues with the trigger except during the slam fires. It's all cleaned out. My guess is that it's a combination of light trigger spring and soft primer. I'll find out Thursday at the range. I plan to be there early to set up my new chrono.
you have to isolate the problem. It is either the trigger or the ammo.
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That you're trying to justify why your "tools" feel smaller in your hands???
:rofl: :rofl: :rofl:
Due to the large frame size of my "tools" it takes two very large hands to get a grip on them properly. :shake: :shake: :shake:
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Due to the large frame size of my "tools" it takes two very large hands to get a grip on them properly. :shake: :shake: :shake:
....
This thread is about bump firing.....oh wait....never mind
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This thread is about bump firing.....oh wait....never mind
:rofl: :rofl: :rofl:
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Accidental discharge. . . :rofl:
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If you say that you have to recock the hammer after the double, then I would say you may have a problem with sear engagement.
Wouldn't rule out soft fed primers. They are known to have issues in ARs.
Maybe, (rifle completely unloaded pointed in a safe direction no ammo anywhere around, yadayada) you could cycle it by hand, letting the bolt slam home, and see if the trigger resets every time, or if the hammer falls home without you re-pulling the trigger, to see if your hammer is falling off the sear?
Maybe check carefully down in the trigger group, to see if there is any crud or burrs that might be effecting proper function?
I agree with Heavies. i think your double fire issue is a result of either a malfunctioning disconnector, or inadequate trigger/hammer engagement surface area or tension.
did you install one of those grip screws that push up on the trigger bar? like this: https://www.joeboboutfitters.com/JoeBob_s_AR15_Grip_Screw_Trigger_Adjuster_p/jb-triggeradjuster.htm
when you shoot, do you normally do a full trigger follow through and then wait for the full trigger reset? or do you have a tendency to slap the trigger?
if the two questions above don't resolve your issue, then i suspect that you're getting hammer follow due to inadequate trigger/hammer engagement surface area or tension.
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what kind of trigger do you have?
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Can you check the springs on the trigger? This guy has a similar issue as you. Info on trigger spring starts at about 5:00m.
https://youtu.be/L50Mj3XTD-w?t=5m
He kinda rambles.. lol
Someone commented that if the hammer spring is not strong enough, it can cause the hammer to bounce off the disconnector, instead of the disconnector catching it, causing the rifle to double or even worse.
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I agree with Heavies. i think your double fire issue is a result of either a malfunctioning disconnector, or inadequate trigger/hammer engagement surface area or tension.
did you install one of those grip screws that push up on the trigger bar? like this: https://www.joeboboutfitters.com/JoeBob_s_AR15_Grip_Screw_Trigger_Adjuster_p/jb-triggeradjuster.htm
when you shoot, do you normally do a full trigger follow through and then wait for the full trigger reset? or do you have a tendency to slap the trigger?
if the two questions above don't resolve your issue, then i suspect that you're getting hammer follow due to inadequate trigger/hammer engagement surface area or tension.
I installed the grip screw but removed it. I pull then wait. It doesn't usually happen immediately afterwards. More like when I start to reset the trigger.
Anyways, I decided that the slam fire problems were with my trigger. I shot the PMC Bronze ammo and had a few slam fires, so it's probably not just the Federal primers. Interestingly, I only had two slam fires out of the 100 rounds of TAC and Fed primers I shot. I plan to replace the trigger soft springs I installed with the stock springs and see if the problem goes away.
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I plan to replace the trigger soft springs I installed with the stock springs and see if the problem goes away.
I had the opposite issue with a .308 build. Went soft on trigger springs and the thing would not reliably fire NATO surplus. Had to go back to heavy stock springs.
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I installed the grip screw but removed it. I pull then wait. It doesn't usually happen immediately afterwards. More like when I start to reset the trigger.
Anyways, I decided that the slam fire problems were with my trigger. I shot the PMC Bronze ammo and had a few slam fires, so it's probably not just the Federal primers. Interestingly, I only had two slam fires out of the 100 rounds of TAC and Fed primers I shot. I plan to replace the trigger soft springs I installed with the stock springs and see if the problem goes away.
What trigger do you have installed? Did you do any modifications?
That will help research of anyone else has been having similar problems. And provide information to help determine what is happening.
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What trigger do you have installed? Did you do any modifications?
That will help research of anyone else has been having similar problems. And provide information to help determine what is happening.
I replaced the lower trigger with a flat trigger and replaced the trigger and hammer springs with softer ones. I'm saving my money for a drop in trigger so maybe in a couple months.
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I replaced the lower trigger with a flat trigger and replaced the trigger and hammer springs with softer ones. I'm saving my money for a drop in trigger so maybe in a couple months.
You started with std USGI trigger group? Or other base trigger group?
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Standard. Suggestions?
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What type of flat trigger? May be it's not compatible with the standard sear angle or disconnecter.
Maybe stacking of tolerance, mixed with the light springs is causing the issue.
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It's a cheap replacement until I save up for a real trigger assembly so could be. The slam fires started happening months after I installed the trigger. If it had started immediately, I would have swapped it back then. Perhaps the soft springs have lost their springiness.
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It's not really a slam fire if the problem is your trigger.
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The RRA "NM" trigger is a good priced option and performs well. Had one for years. If you shop around you can get one for around $80.
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I replaced the hammer spring with the stock spring. It's now at 3# pull. I fired 90 rounds on the 300BLK today with no problems. The trigger return feels a lot stiffer now. Thanks for everyone's help. :shaka:
I have about 300 Fed primers left then switch over to the CCI 450 primers I bought.
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Just to be a little bit pedantic:
Bump fires are the result of a shooting technique, and are usually deliberate. Bump firing is a way to fire a semi-auto very rapidly, at speeds approaching that of full-auto. It's possible to have a negligent bump fire, either with a very light trigger or amazingly sloppy trigger control.
Slam fires, on the other hand, are a malfunction of the gun. Inertia drives the firing pin into the primer when the bolt closes. While people tend to associate this malfunction with guns that use floating firing pins, it can happen to pretty much any gun.
On a side note, the concept of slam fire is pretty close to how machine guns that fire from the open bolt position are designed. The "firing pin" doesn't move at all; it's welded to the front of the bolt. When the bolt closes, it ignites the round.
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Good information. I agree that it's a slam fire. I kept the bump fire in the title because it was part of the discussion.
The hammer spring feels a lot more substantial now that I reinstalled the stock spring. I surmise that the heavier spring is holding the hammer back enough to prevent the firing pin from hitting the primer with enough force to set it off.
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Good information. I agree that it's a slam fire. I kept the bump fire in the title because it was part of the discussion.
The hammer spring feels a lot more substantial now that I reinstalled the stock spring. I surmise that the heavier spring is holding the hammer back enough to prevent the firing pin from hitting the primer with enough force to set it off.
no the sear holds the hammer back
those trigger parts look out of the ordinary
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I'm referring to when the trigger is released which pushes the disconnector off the hammer and onto the sear. There is a noticeable clunk sound unless it's the last round in the mag. With the heavier hammer spring, the "clunk" is more distinct.
https://youtu.be/xh2FjzVVIZY?t=2m9s
I appreciate the feedback. This helps me figure out what's happening in the trigger.
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I'm referring to when the trigger is released which pushes the disconnector off the hammer and onto the sear. There is a noticeable clunk sound unless it's the last round in the mag. With the heavier hammer spring, the "clunk" is more distinct.
https://youtu.be/xh2FjzVVIZY?t=2m9s
I appreciate the feedback. This helps me figure out what's happening in the trigger.
i think what ren is trying to say is that you're experiencing neither a slamfire nor a bumpfire.
i think he's also trying to say that, if you were experiencing a true slamfire, then it wouldn't matter how strong of a hammer spring or trigger spring you put into your fire control group. even the heaviest springs would not remedy a slamfire problem.
i personally think you should stop screwing with your fire control group until you have a solid understanding of the mechanics of it and how it plays with everything else in the rifle (e.g. the bolt carrier group). if you continue to own/possess/use a firearm that occasionally fires multiple shots with the press of a trigger, you're opening yourself up to criminal liability under state and federal laws that pertain to "machine guns."
please don't interpret my post as a personal attack. i just think it is a little unwise to document your use and possession of something that could potentially result in jail time.
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i think what ren is trying to say is that you're experiencing neither a slamfire nor a bumpfire.
i think he's also trying to say that, if you were experiencing a true slamfire, then it wouldn't matter how strong of a hammer spring or trigger spring you put into your fire control group. even the heaviest springs would not remedy a slamfire problem.
i personally think you should stop screwing with your fire control group until you have a solid understanding of the mechanics of it and how it plays with everything else in the rifle (e.g. the bolt carrier group). if you continue to own/possess/use a firearm that occasionally fires multiple shots with the press of a trigger, you're opening yourself up to criminal liability under state and federal laws that pertain to "machine guns."
please don't interpret my post as a personal attack. i just think it is a little unwise to document your use and possession of something that could potentially result in jail time.
Amen TFP!
(https://uploads.tapatalk-cdn.com/20170828/f2cb422c65339ebc7a753eb6c0726389.jpg)
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LOL, thank you for the warning. It's a good thing I didn't mention the taxes I'm cheating on.
Both are probably right that its neither a slam or bump fire. I'm hopeful the issue has been solved.
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that trigger assembly looks nothing GI or anything OE
a standard GI spec trigger is heavier than 3# a GI is ~9# single stage
Where'd you get those trigger parts anyways? Did you file any surfaces? If you did - trash it and get a GI trigger assembly.
The trigger surfaces are surface hardened only. Once you break that surface the trigger material underneath is soft and will wear quickly.
Get a Geissele, Larue, Milazzo-Krieger or RRA. Proven triggers. I doubt you will find or make anything better than what Wisconsin Trigger Company or Geissele already has.
Don't reinvent the wheel because there are already solutions for your quest. Just like reloading recipes for ARs. Many shooters before you & I found proven solutions.