Nice .22 ar addition - CMMG 22LR Mk4 Barrel Kits w/ Bolt Group

I bought one of these years ago and built it on the AR15 platform using a PSA upper and lower. One can buy a .22 look alike AR, but building it on the AR platform one cannot distinguish it from the real thing. I installed a teardrop forward assist which will not function as well as Magpul furniture, front sight base along with a carbine gas tube that of course will not work since it is blowback. A colt carry handle and side sling mount. I also added a 3.5lb 2 stage trigger. I prefer single stage triggers but I have a few 2 stage lying around. The gun works very well, including subsonic .22 through a borrowed suppressor. When I get around to it I will also build this one. Since the CMMG .22 has the A4 profile barrel I will keep it that way and add a pinned front sight base instead of a free float handguard. The barrel is 16.1" but it goes further into the upper than a 5.56 barrel so it does not stick out past the sight base as far as a 16" 5.56 legal carbine barrel does. The barrel it threaded 1/2-28 so any muzzle device will work. I have an A2 birdcage on mine, not tightened of course. CMMG recommends a certain trigger, but the aftermarket 3.5 LB one I put in it works good.