I guess I should have said range reports in the title since I have been to the range a couple of times already…
Range Report 1
I was able to sneak away for a quick range trip while Wonderful Wife was taking a nap. I was back at the house a bit more quickly than I had expected though.
My first test was with the 7.5 inch 5.56 upper. I have had this little fire-breather and I know it works. It’s just really loud and obnoxious. The first round chambered properly and fired as expected. The second round chambered but the trigger was dead. I ejected the round manually and the next round fired but the subsequent round did not.
I switched to the 10.5 inch 300 Blackout upper and the results were the same with both subsonic and supersonic rounds. Just to be thorough I even tried swapping the bolt carrier groups between the two uppers. No change. It seemed like maybe the hammer was not being reset properly. I figured I had just reversed a spring or something.
Once I got home and took the trigger group apart I couldn’t find anything wrong with the way I had assembled it. I did notice that both the trigger and hammer springs seemed a little lighter than some of the extras I had laying around and the parts were not as well made. I also noticed that some of the rounds that I had ejected to clear the dead trigger had very slight indentations like it was a light strike which was odd since the trigger was dead so there should have been no marks from the firing pin. So it looked like the hammer was being reset but something wasn’t catching it to hold it in place so it would just bounce back and strike the firing pin with enough force to sent the primer but not enough to fire the round. I was surprised it didn’t go full auto on me at the range. With a stronger hammer spring it probably would have.
Rather than spend a lot of time replacing one part at a time I replaced the whole trigger group with one I took out of the 7.62×39 AR when I installed the ALG trigger (link).
Range Report 2
After my trip to Portland I took a day off to rest and recover (flying and sitting in airports for about 12 hours wears me out). What better to do on my day off than to head back to the range for some more AR pistol testing!
With the trigger group replaced everything worked perfectly.
Again I started with the 5.56 upper since it was a “known good” piece.
As you can see from this video, everything worked fine. You can also see how crazy the muzzle flash is on this little monster. What you can’t tell is how loud it actually is. Even with ear muffs it is a bit painful to shoot at an indoor range.
Next, I switched to the new 300 Blackout upper using supersonic ammunition. It also worked flawlessly. With the slightly longer barrel and the quicker burning powder I expected a lot less drama with this upper and I was not disappointed.
Almost no muzzle blast and although you can’t tell from the audio it is a lot quieter to shoot. The recoil was about the same as the 5.56, no change there.
Next up, the same upper with subsonic ammunition
You probably can’t tell from the video but the subsonic ammunition is a good but quieter than the supersonic stuff and orders of magnitude quieter than the 5.56 out of a 7.5 inch barrel. The recoil is also noticeably less.
This little gun will primarily be a range toy for a bit until I get a lot more experience with it but I like everything I own to be capable of delivering hits when I need it to should something really bad hit the fan. I sighted it in at around 21 feet since that is about the longest shot I could possibly take within my home and I was able to put shots on target pretty quickly with this little guy but I also discovered something interesting.
While I was a little high at 21 feet (bottom targets) when I moved out beyond that my groups migrated north several inches. I was a bit confused at first but after checking a few resources I was able to confirm what I suspected, the bullet begins to rise after 21 feet and does so pretty quickly.
The other thing I found was that within these ranges there was no real difference in the impact point for supersonic or subsonic rounds. Which is something else I was very curios about.
All in all I like this little set up but I need to spend a good bit more time with it before I would bet my life on it.