If so what's your experience with it? A review was surprisingly hard to find, Google just turns up a bunch of people writing and making youtube videos about CMMG's conversion bolt for 5.56 uppers.
I'm pretty happy with mine. I got the one they make with the low profile front sight block (http://cmmginc.secure-mall.com/item/Sierra-.22-LR-Upper-Receiver-w-Low-Profile-Railed-GB-1514) and went for the stainless bolt for an extra $30 or so. They're selling the mags for it for $20 each currently. I put a Burris 2-7x scope and one of those quick detach bipods they sell for $30 or less on Amazon on the thing and it's at least as accurate as I am inside of 100 yards. So far the best I've gotten was a 5 shot group that fit inside a quarter (as in 25 cents, not a 1/4 inch) at 50 yards and it'll routinely shoot jagged hole 5 shot groups at 25 meters.
It has not been 100% reliable, probably more like 98 - 99%. So far the only time it's had issues was chambering the first round from a mag, sometimes that first round will act like it doesn't want to fit in the chamber. The other 24 rounds in the mag will run fine though
Apparently CMMG just started selling a 20 inch barrel M16A2 style 22LR upper. Is there much of a difference in range/accuracy between 16 and 20 inch barrels for 22LR?
I'm pretty happy with mine. I got the one they make with the low profile front sight block (http://cmmginc.secure-mall.com/item/Sierra-.22-LR-Upper-Receiver-w-Low-Profile-Railed-GB-1514) and went for the stainless bolt for an extra $30 or so. They're selling the mags for it for $20 each currently. I put a Burris 2-7x scope and one of those quick detach bipods they sell for $30 or less on Amazon on the thing and it's at least as accurate as I am inside of 100 yards. So far the best I've gotten was a 5 shot group that fit inside a quarter (as in 25 cents, not a 1/4 inch) at 50 yards and it'll routinely shoot jagged hole 5 shot groups at 25 meters.
It has not been 100% reliable, probably more like 98 - 99%. So far the only time it's had issues was chambering the first round from a mag, sometimes that first round will act like it doesn't want to fit in the chamber. The other 24 rounds in the mag will run fine though
Apparently CMMG just started selling a 20 inch barrel M16A2 style 22LR upper. Is there much of a difference in range/accuracy between 16 and 20 inch barrels for 22LR?
