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Published on Aug 15, 2010
Shooting junk in the desert with the CMMG .22lr conversion for AR-15's with my Rock River Arms carbine. Been using this conversion for over a year with about 95% reliability. I have put close to 10,000 rounds through the kit (i love shooting .22lr). There was a bit of a break in period when I first got the kit, but after about the first 500 rounds or so it now functions near flawless (says alot being a .22 and all..) I do not recommend using "hyper velocity" rounds as you will find that they go everywhere except what you are aiming at. Use standard or high velocity rounds only. I usually shoot what you'll see in the video, cheap, cheap, cheap federal bulk ammunition and it runs great. I'll usually top off an hour of shooting the .22's by putting the original AR bolt back in place and blasting the gunk out with some .223 remington. If you cannot do that then I recommend REMOVING the .22lr conversion after shooting, as it is possible to experience some issues removing it later.