Your chrono is too close if it affects your readings.

Yes, the problem with KHSC is that the far left tables are too short for me and prone is problematic. Some day I'll get a magnetospeed but saving up for a better scope.

I don't participate in any competitions but when shooting an AR-15 platform 223/556 at HDF Range Days and certain HRA/LIFE Fun Shoots, there may often be a timer on you and that is when I realize the benefits of having a muzzle brake. When I shoot 223/556 at the Rifle range my AR has an unthreaded bull barrel.

That makes sense.

I don't participate in any competitions but when shooting an AR-15 platform 223/556 at HDF Range Days and certain HRA/LIFE Fun Shoots, there may often be a timer on you and that is when I realize the benefits of having a muzzle brake. When I shoot 223/556 at the Rifle range my AR has an unthreaded bull barrel.

We’ve done multiple shots with HRA/LIFE and I would like to get to multiple targets.  That’s where I notice where the comp helps me cut down the times. The VTAC 1-5 is a pretty well known one that combines both.

And when the timer is out and you’re shooting with friends (other shooters), you’re competiting.   

We’ve done multiple shots with HRA/LIFE and I would like to get to multiple targets.  That’s where I notice where the comp helps me cut down the times. The VTAC 1-5 is a pretty well known one that combines both.

And when the timer is out and you’re shooting with friends (other shooters), you’re competiting.   

At the HDF carbine class, my wife shot the VTAC board faster than me.  I guess when  you're using free ammo, you can spray and pray more.

AFAB is on it's way.  Ordered the SLR Rifleworks Synergy Comp 5.56 for another gun (non-pinned).  Looking forward to trying both.  Will be able to compare with BC.  Though the gas systems and overall weights of guns will be different, should be a fun comparison. 

Was able to shoot ARs with both the AFAB and SLR Synergy comp this past weekend.  Wasn't able to really see the benefits of either as I was mostly concentrating on zeroing the red dots on both, but it was a good opportunity to evaluate them both.

AFAB is on Colt 14.5" carbine gas upper with BCM KMR rail and EoTech EXPS 3-0.  Probably one of my lightest AR setups, if not the lightest.  I could have paired with an T-1 and it would be quite a bit lighter.  I'd have to weight them, but my BCM middy upper with lightweight barrel and T-1 might be lighter, but it has a somewhat heavier DD Omega rail. 

SLR Synergy is on an LMT 16" mid-length gas with MRP 12" monolithic upper with Comp M4s.  This is the heaviest AR setup that I have. 

Overall impressions is that the SLR is noticeably louder and more concussive blast felt than the AFAB.  However, both weren't as loud as most side venting brakes that I've been around.  There was another shooter with a size venting brake shooting a couple of benches over and that thing was pretty loud.  I didn't get a chance to see what ammo he was shooting.  One of the black powder guys was guessing it was 300 BLK, but it seemed louder than most 300 BLK loadings that I've heard.  But then again, many of those 300 BLK loadings were for competition and likely loaded lighter. 

Both are hybrid comps and flash hiders, with the intent on controlling muzzle rise/movement (or at least I believe and that's what I was looking for).  When some others were shooting both guns, I was able to observe from the side and almost even with the muzzle to behind the shooter.  The AFAB seemed louder than an A2, but the concussive blast/pressure was much milder than I had thought.  I'm guessing that is due to the very small vents.  The AFAB actually seemed louder and more felt concussive force at about 45 degrees behind the muzzle than directly to the side. 

The SLR Synergy has much larger vent holes and is somewhat like a BC but with much larger holes and short 4 prong flash hider.  I was surprised that it was noticeably louder than the AFAB, especially considering the AFAB was on a 14.5" carbine gas and the SLR was on a 16" midlength.  It wasn't obnoxious, but was louder than the AFAB. 

I was able to shoot the AFAB standing.  I was able to keep the dot on a steel plate at 100 yards in between shots and was able to get follow-up hits in what I felt was decent splits.  I am guessing that the plate was 10-12" in diameter.  I was very happy about that.  I didn't have a chance to shoot the SLR standing though. 

Overall, I am very happy with the AFAB.  I just found that I had to push the light further back as the carbon was getting on the lens of the light.  I was thinking of pushing the light and front sight back a little anyways.  I ended up pushing the light and front sight back two positions on the top rail and was able to keep the position of the short vertical grip that I used as a handstop.  Will see how that works out and if that position keeps carbon from building up on the light. 

I'll have to shoot the gun with the SLR a bit more.  I have the same comp for my AK build, so that might be a fun comparison. 

I don't participate in any competitions but when shooting an AR-15 platform 223/556 at HDF Range Days and certain HRA/LIFE Fun Shoots, there may often be a timer on you and that is when I realize the benefits of having a muzzle brake. When I shoot 223/556 at the Rifle range my AR has an unthreaded bull barrel.

A side-by-side comparison of the AFAB and your gun with the VG6 (Epsilon or Gamma) would be interesting.   

I know you already purchased but just because it was brought up, I'm a big fan of my BCM GF comps. I had them on three different guns but just switched my primary to the CTN Warcomp to try. My purposes for these guns require some type of hybrid more than anything else.

I know you already purchased but just because it was brought up, I'm a big fan of my BCM GF comps. I had them on three different guns but just switched my primary to the CTN Warcomp to try. My purposes for these guns require some type of hybrid more than anything else.

I've wanted to try the BCM GF comp for a while, but just decided a different direction for this particular gun.  I still might try that on another gun though. 

I looked as some Surefire ones, but they were mostly brakes.  I'd love to have one for mounting a suppressor. . . of course, with the suppressor. 

I have a BCM GF comp around somewhere, I'll see if I can find it and let you try it out.  It wasn't as good overall as the Battlecomp.  Did a side by side on my old YouTube channel.  Probably still have the video if I can dig it up.

I have a BCM GF comp around somewhere, I'll see if I can find it and let you try it out.  It wasn't as good overall as the Battlecomp.  Did a side by side on my old YouTube channel.  Probably still have the video if I can dig it up.

Great.  Maybe one of these days.  I don't see changing muzzle devices that I have on now for a while.  Maybe if I were to get another upper in the future. 

Maybe not the most scientific or comprehensive video, but I would love to do some comparisons like the video below.

Was able to shoot both of my guns with the AFAB and the SLR Synergy Comp over the weekend.  Probably around 300 rounds through each. 

AFAB - Love that device. It wasn't obnoxious at all.  I asked the shooters either side of me and they said it wasn't noticeably louder than an A2.  The shooter on the left of me was pretty new to shooting an AR, and it didn't bother her at all.  Though I think much of that was due to her pretty intense focus on the shooting, which I thought was great!  The upper that the AFAB was on is probably my lightest and the muzzle rise was minimal.  We did a number of cadence and multiple target exercises and didn't notice the dot jumping around much.  I wish I had the exact same upper set up with a pure flash hider to have done some side-by-side.  The only negative was that the device had worked loose after about 300 rounds, so back to the shop it goes today.  Not sure what happened, but the shim was able to spin freely and the device itself seemed to be timed about right, even though it would twist slightly back and forth.

SLR - Switched to that upper after I noticed the AFAB had worked loose.  To me, it's louder than the AFAB.  We were doing multiple target exercises at that point and it seemed to help with keeping the dot from dancing around too much.  However, this is probably the heaviest upper that I have and I feel that that weight helps with the muzzle rise, so tougher to gauge.  But overall, I did feel that it helped with muzzle control.  One thing I did notice is every so often, I would see a red flash rise from the device.  Sort of like a quick red flame coming straight up.  Not super distracting, but something that I noticed here and there.  Not sure if I will stick with this one.  Might see it offered up in the classified section.  I have one for my AK47, so will see. 

Took the upper back to the guy who did the pin and weld.  Apparently, a little bit of play is normal.  He explained that since most muzzle devices work to counter the rifles "natural" movement, the pins get fatigued and can develop some give.  Apparently mine was on the "more give" end of the spectrum.  No evidence of muzzle strikes, but there was both some twist play and side to side tilt play.  So he suggested an alternate/supplement weld to help mitigate that.  This being a relatively new gun and one that I envision shooting a lot and definitely not babying, I was not comfortable with the side to side play.  So going to replace the device and use the alternate weld method. 

So they don't screw on the break then weld it so it cannot be removed to keep the 16 inch law requirement?

Took the upper back to the guy who did the pin and weld.  Apparently, a little bit of play is normal.  He explained that since most muzzle devices work to counter the rifles "natural" movement, the pins get fatigued and can develop some give.  Apparently mine was on the "more give" end of the spectrum.  No evidence of muzzle strikes, but there was both some twist play and side to side tilt play.  So he suggested an alternate/supplement weld to help mitigate that.  This being a relatively new gun and one that I envision shooting a lot and definitely not babying, I was not comfortable with the side to side play.  So going to replace the device and use the alternate weld method. 

There shouldn't be any play in the muzzle device, that would really screw with accuracy. 

So they don't screw on the break then weld it so it cannot be removed to keep the 16 inch law requirement?

As I understand it, the play is where the pin meets the dimple in the barrel.  Since the pin is welded near the surface of the device, would need to remove the weld and the pin in order to tighten back down.  However, no way to remove the weld without ruining the device, so. . .

So they don't screw on the break then weld it so it cannot be removed to keep the 16 inch law requirement?

It's screwed down and a pin is installed into a detent drilled into the threads.  The end of the pin is then welded over to prevent the muzzle device from being unscrewed.

There shouldn't be any play in the muzzle device, that would really screw with accuracy.

I agree.  One proposed fix was to add a "retaining" weld, but that the device as it had some lateral play bothered me.  Enough that I chose to abandon the existing device and replace. 

As I understand it, the play is where the pin meets the dimple in the barrel.  Since the pin is welded near the surface of the device, would need to remove the weld and the pin in order to tighten back down.  However, no way to remove the weld without ruining the device, so. . .

The pin should be a hardened pin, like drill rod.  it shouldn't give.

The pin should be a hardened pin, like drill rod.  it shouldn't give.

I hear what you're saying and that's what I thought, but obviously something happened and just relaying how it was explained to me.  That the operation of the device often involves a torsional stress between the device and the barrel.  That that stress "fatigues" the contact point between the barrel and the pin and that leads to the play.  Something about all devices with pin and weld experience it to a certain level.  The fix here is to have a "setting weld" that runs from the face of the device and forms a bead line of weld to the barrel.  Supposedly that prevents the fatigue effect. 

This is a trusted installer, so I'm taking his word at this point.  He's working with me to make it right, so that's the main thing right now.

I hear what you're saying and that's what I thought, but obviously something happened and just relaying how it was explained to me.  That the operation of the device often involves a torsional stress between the device and the barrel.  That that stress "fatigues" the contact point between the barrel and the pin and that leads to the play.  Something about all devices with pin and weld experience it to a certain level.  The fix here is to have a "setting weld" that runs from the face of the device and forms a bead line of weld to the barrel.  Supposedly that prevents the fatigue effect. 

This is a trusted installer, so I'm taking his word at this point.  He's working with me to make it right, so that's the main thing right now.

Roger that. Not implying anything. Things wear out.