Another possibility is upside down battery.

Another possibility is upside down battery.

This happened to me as the tray is very snug for my Holosun. So when I popped it out, IDK which way the batter was because it flipped like a coin.

Separate topic, but you can setup double feeds as well.  In a SB a LONNNGGG time ago, your partner has to setup your mags.  General intent was 2 randomly spaced casings inserted to simulate double feed to occur randomly in a COF.  My partner happened to put like 4-5 in one mag. . . ended up being during the portion of the COF where I was at the bottom of the VTAC. . . evil. . . I could hear them laughing. . .   

   We do one called "F" your buddy where buddy loads mags and tosses in a couple snap caps randomly and inserts in your holstered firearm.
Tap and rack dance.
Some "buddys" will fill the whole mag with dummy's, but after 3 or more, I automatically change mags

    I like iron sights but I (or should I say my eyes) finally broke down for the dot on my HDS.
G19 with light and holosun, it does not conceal well on my slim    figure for CC.
I do well with my smaller frames from concealed but usually don't go anywhere, maybe town once or twice a month and feel the CC need more when returning home and entering my house.

  My range bag always has extra battery's for all equipment that requires them, including ears, but I've given them more to others than needed myself.

   Our qaul times are all under 2.5 up to 7 yards (one guy under 1.5 but he's an alien),  around 5 sec @ 10 yds and a hair over that from 15yds (alien is faster).
USUALLY 100% or 10 points off if trying to push it.
Have not shot test with HD gun yet but will this weekend.

Which Holosun did you end up going with?  407

Does the alien's name start with D? 
Yeah, but I call him "Otto"
I think the last time we were with you was with BB and while I was at truck checking equipment, HPD showed up for  "Someone firing full "Otto" 

re:Otto

Ya.  Those were some great range days. 

For your CC, what light?  Dot is 407K, right?  I have CC'ed a 17 with X300U/T and Acro.  I've lost quite a bit of weight since you last saw me, but still not "trim" like you.  I typically cc a 17.5 with EPS and TLR7A.

   No light on CC, I don't travel out at night.
Besides, with my trim figure, would be hard to conceal. 
Working the G43 and S & W Airweight

   TLR 7 on HD G19 with Holosun 407.

Yeah, saw a recent pic of "less" of you, bet that feels better, but now you can't use your belly to convert your IWB holster into a level 2 holster.   

Trained on a VTAC barrier with a red dot yesterday.  It is so much easier and can be more accurate and quicker as your eye can be slightly out of alignment with the bore or the gun rotated.  Like rotating the gun 90 degrees.  It can be done with irons, but more difficult and slower to do.

I got a TLR7 on my Glock 48.  Doesn't add much to the size.

But like night sights, weapon mounted lights have a relatively small set of circumstances where they would be used. And majority of civilian CCWers don't train the proper use of them.

Didn't put holes in the barrier, but there are plenty holes in barriers that have been "signed". 

No lie, get your sig all over the wood.

Trying the CHPWS Comp RDS on a Glock 34.4.  Had a GC for slide milling for CHPWS, so decided to mill my 34.4 that was sitting around.  I bought it for shooting USPSA Production, but have been shooting Carry Optics, as well as the vast majority of my training and classes are with handguns with RDS.  CHPWS had a sale when milling the slide, so decided to give the Comp a try since I was able to get it for a very good price. 

CHPWS Comp - CHPWS' version/close on the Trijicon SRO (same footprint).  Took it to the range and shot a little over 100 rounds to zero the dot and general testing with the new slide.  Overall, impressions of the dot are ok.  I like the 3 MOA, but will see how the brightness works out.  It was a mostly sunny day, but overcast.  The dot on the max setting I think was ok.  I would prefer to have 1-2 higher settings on a clear day.  I'll shoot it in a match and see and might be ok.  The other two guns that I've been shooting matches with have an Acro and EPS and they have higher settings.  I'll also check the battery, to test if that helps.  Beyond the brightness, I think the Comp is pretty good.  The window is huge and I can see why many folks like the SRO for competition, as well as other uses.  The Comp has a slight blueish/greenish tint to the lens, which is common for the RMR/SRO and I don't notice it when shooting.  The lens is clear and maybe an ever so slight magnification.  The elevation and windage adjustments have distinct clicks, but does need a tiny flat head screwdriver.  The Comp comes with two tools/keys.  One flat head and one torx for the battery compartment.  I opted for the Torx screw option when doing the slide milling, and didn't notice what the standard screws are.

Slide Milling - Milled for the Comp with "Zev posts" and Torx screw option.  Also added diagonal forward serrations and went with the nitride finish.  The estimated turn around time was 4 weeks for the milling and another 2-4 weeks for the nitride.  Total time from shipping to return was a little less than 4 weeks.  Communication with CHPWS was great with both questions prior to the work, and upon receipt of the slide to verify options prior to starting the work.   The milling seems spot on and like the attention to detail on the serrations where the Glock logos are on the left side of the slide.  The serrations have clean edges, which I really like.  The nitride finish is really clean and even, with a slight texture, which I also like.  I also order their low profile BUIS.  With the RDS, the very tip of the fiber optic front sight is visible in the notch of the rear sight.  I would have preferred the RDS be a touch lower, but it's fine where it sits. 

I was a little hesitant sending the gun to CHPWS as they've had mixed reviews.  Both for slide milling and other products/services.  Overall, I am very happy with the slide milling and "ok" with the Comp RDS.

interesting that they can sell enough volume to justify the development costs
and there are so many different models...

Trying the CHPWS Comp RDS on a Glock 34.4.  Had a GC for slide milling for CHPWS, so decided to mill my 34.4 that was sitting around.  I bought it for shooting USPSA Production, but have been shooting Carry Optics, as well as the vast majority of my training and classes are with handguns with RDS.  CHPWS had a sale when milling the slide, so decided to give the Comp a try since I was able to get it for a very good price. 

CHPWS Comp - CHPWS' version/close on the Trijicon SRO (same footprint).  Took it to the range and shot a little over 100 rounds to zero the dot and general testing with the new slide.  Overall, impressions of the dot are ok.  I like the 3 MOA, but will see how the brightness works out.  It was a mostly sunny day, but overcast.  The dot on the max setting I think was ok.  I would prefer to have 1-2 higher settings on a clear day.  I'll shoot it in a match and see and might be ok.  The other two guns that I've been shooting matches with have an Acro and EPS and they have higher settings.  I'll also check the battery, to test if that helps.  Beyond the brightness, I think the Comp is pretty good.  The window is huge and I can see why many folks like the SRO for competition, as well as other uses.  The Comp has a slight blueish/greenish tint to the lens, which is common for the RMR/SRO and I don't notice it when shooting.  The lens is clear and maybe an ever so slight magnification.  The elevation and windage adjustments have distinct clicks, but does need a tiny flat head screwdriver.  The Comp comes with two tools/keys.  One flat head and one torx for the battery compartment.  I opted for the Torx screw option when doing the slide milling, and didn't notice what the standard screws are.

Slide Milling - Milled for the Comp with "Zev posts" and Torx screw option.  Also added diagonal forward serrations and went with the nitride finish.  The estimated turn around time was 4 weeks for the milling and another 2-4 weeks for the nitride.  Total time from shipping to return was a little less than 4 weeks.  Communication with CHPWS was great with both questions prior to the work, and upon receipt of the slide to verify options prior to starting the work.   The milling seems spot on and like the attention to detail on the serrations where the Glock logos are on the left side of the slide.  The serrations have clean edges, which I really like.  The nitride finish is really clean and even, with a slight texture, which I also like.  I also order their low profile BUIS.  With the RDS, the very tip of the fiber optic front sight is visible in the notch of the rear sight.  I would have preferred the RDS be a touch lower, but it's fine where it sits. 

I was a little hesitant sending the gun to CHPWS as they've had mixed reviews.  Both for slide milling and other products/services.  Overall, I am very happy with the slide milling and "ok" with the Comp RDS.

If you're milling the slide, why not mill it for the optic that you're going to use?  I mean, adding a plate adds extra cost, stuff that can go wrong, and slight increase in bore height.

Are Trijicon SRO, RMR, etc...diff footprints? I never looked into this or Holosun's as I only have 1 RDS, so it's moot for us.