I came home early from a wind aborted second day of fishing and Sue said, "A big box came for you." A tad baffled because the only thing I had ordered was a CMMG .22 AR conversion bolt and a 3 pack of magazines, and the bubble pack I saw in the ad should not be much bigger than a good sized hard cover book. I had placed the order with MSR Arms and saved over 30 bucks from suggested retail.
Sure enough, it must have been the only box laying around because they dropped the kit in the bottom and stuffed 25 feet of heavy folded brown packing paper on top of it. I'm not exaggerating, The paper was in one long continuous piece. Sue cut it in approximately one foot pieces and neatly folded it next to the wood box. We will start fires for a month with that.
The garden shed floating slab site was all prepped and the Redi-Mix truck was due at 3:30pm so I had a few minutes. One of my lowers is away with my friend Charlie for one of his fabulous triggers, so I took the Rooskie upper off another put the 5.56 upper on and dropped in the CMMG adapter. Literally that easy, a snap, seconds. Takes much longer to thumb 20 rounds into a 25 round mag. I walked out to the bench and found a gong at 25 yards that had an area of un pocked paint and let fly. 2 1/2" low and an inch and a fuzz left. I fired a second shot and the paint chip got bigger. I was not and am not expecting target grade accuracy from this combo. In my typically over active mind it cannot be very accurate. The fired projectile has to jump the length of an unrifled faux .223 cartridge that is part of the adapter before hitting the .223 throat and engaging the 1 in 7 twist .224" diameter barrel. Hardly Kidd Super Grade precision .22 long rifle excellence. But for $196.18 to my door it was much cheaper than replacing the M&P AR22 S&W I just traded off for a S&W Model 63.
I tweaked the 25 yard zero a bit but the Aim Point red dot is probably a 4 MOA dot and you know, it is what it is. Later after the concrete was poured and floated but awaiting the trowel finish, the two young guys that were working with their Dad on the slab had some time. These young guys are my young shooting buddy and his younger brother. Now both hard working young men, the younger works as a lineman and does concrete on the side. Ever eager to pull a trigger they were happy to try the adapter. We shot 25 yard 3" diamonds, 50 yard 4" squares, 80 yard prairie dogs and 5" diamonds. We were shooting 36 gr. plated bulk pack Federal hollow points and had near flawless operation. One light primer strike that was reloaded in another mag and fired without incident.
I repainted some steel to try and get an idea of how inaccurate this combo is. The nit pickers on RimfireCentral were bashing this set up with a couple of guys claiming 8" "groups" at 50 yards. Well I can truthfully say it is no worse than 4 MOA. Considering that the red dot covers most of the 5" diamond we hit the vast majority. Once in a while we'd get a, "Huh, how'd I miss that one?", but for the most part i does what a wanted. A .223 under study that I can plink with, without the noise of full power 5.56, not to mention the expense and chasing the brass. I can shoot my .22 knock down targets that I enjoy so much. The 25 yard 3" diamonds shot off hand are just murder. If you miss one it is on the shooter because a 1" group all the time, should land on the target. The 4" squares at 50 and the 80 yard targets require you to make sure you are holding center to get a hit, whereas my Kidd or Bergara will hit them if there is white paint under the cross hair right out to the edges and corners. But the Kidd and Bergara have 12 oz. and 14 oz. triggers, up to 18X magnification, and are fed target ammo, so they darned well better be better.
Function as I said, near flawless, the one miss fire the only glitch only glitch in about 100 rounds. Clean up was a snap with some Hornady One Shot cleaner and lube, on a rag and I pulled the .22 bore snake through the upper.