Since I've seen so many posts here lately about .22LR AR-15s and AR replicas (such as the M&P15-22 and Umarex "Colt" M4-22), I thought I would post an update of my CMMG Sierra.
At this point, I've shot approx 4000 rounds through this set-up (unfortunately, the ammo craze and unavailability of .22LR has certainly put a damper on my shooting).
All the previous praise still applies. In all this time, I've only had 2-3 fails to fire, all of which were certainly ammo issues (the rims showed good firing pin strikes). Most ammo fired to this point has been bulk copper-washed Federal or Federal American Eagle (mostly copper-washed HP, but also some lead round nose). Nothing any pricier than that, and never Mini-Mags (which so many folks seem to need for their semi-auto .22s).
Accuracy is still excellent as well. With bulk ammo, this rifle is every bit as accurate as my accurized 10/22 with bulk ammo (the Green Mountain-barrelled 10/22 can really put up some groups with match ammo though).
There's a lot of talk about steel-lipped versus polymer-lipped Black Dog mags. All I can say is that both have been excellent so far.
Boy, I sure am glad I got this upper when I did. When I purchased it in July 2012, I paid $370, which I thought was high, since I had seen them for under $320 a few months earlier. The last one I saw for sale locally a few weeks ago (the new uppers now seem much more rare than complete rifles) was a whopping $530! That's a $200 price hike in just one year!
Anyway - the obligatory photo. Not much has changed with the exception of a rear MBUS back-up sight, which has seen use thanks to a dead battery in the Vortex StrikeFire. The StrikeFire is a nice red-dot, but the poor power button location (it can easily be turned on when the rifle is stored in a case) makes it a dealbreaker if used in a defensive rifle.
At this point, I've shot approx 4000 rounds through this set-up (unfortunately, the ammo craze and unavailability of .22LR has certainly put a damper on my shooting).
All the previous praise still applies. In all this time, I've only had 2-3 fails to fire, all of which were certainly ammo issues (the rims showed good firing pin strikes). Most ammo fired to this point has been bulk copper-washed Federal or Federal American Eagle (mostly copper-washed HP, but also some lead round nose). Nothing any pricier than that, and never Mini-Mags (which so many folks seem to need for their semi-auto .22s).
Accuracy is still excellent as well. With bulk ammo, this rifle is every bit as accurate as my accurized 10/22 with bulk ammo (the Green Mountain-barrelled 10/22 can really put up some groups with match ammo though).
There's a lot of talk about steel-lipped versus polymer-lipped Black Dog mags. All I can say is that both have been excellent so far.
Boy, I sure am glad I got this upper when I did. When I purchased it in July 2012, I paid $370, which I thought was high, since I had seen them for under $320 a few months earlier. The last one I saw for sale locally a few weeks ago (the new uppers now seem much more rare than complete rifles) was a whopping $530! That's a $200 price hike in just one year!
Anyway - the obligatory photo. Not much has changed with the exception of a rear MBUS back-up sight, which has seen use thanks to a dead battery in the Vortex StrikeFire. The StrikeFire is a nice red-dot, but the poor power button location (it can easily be turned on when the rifle is stored in a case) makes it a dealbreaker if used in a defensive rifle.
