For black friday I got myself one of the CMMG .22 drop-in conversion kits and a couple of boxes of the Federal black .22 for right around .025 cpr. My math was that, with the cost of the kit, i would break even shooting 1k rounds. It also seems useful for rough zeroing new guns/ optics, something that has always struck me as a waste of ammo. My goal is to stack only good quality 5.56, while burning the cheap .22 at classes.
The first time out i had a fair number of failures to extract that frequently lead to double feeds. I shot right around 250 rounds. Out of a 11.5 barrel POI was a couple inches lower than zero, but was able to stay on a steel silhouette at 100yds. Good enough.
I disliked how the bolt does not activate the Bho, so when you drop an empty magazine, the bolt closes, and you must charge the rifle. This changes my mag change routine. I also found that the bolt cycles WAY faster than normal. While quite fun, I had to remind myself to slow down during fire and movement drills, and not just impatiently doubletap every shot.
When cleaning, i found that the chamber adapter had split. CMMG quickly and politely replaced it.
The next time out i shot around 200rounds, this time mostly out of a 7.5" pistol, with only a couple assorted malfunctions, much less than before. Flash and report wad quite deceptive, making it a bit of a shock going back to 5.56!
I will continue to use this kit, and do feel that it will help me meet my goals of shooting more, despite its few problems.
The first time out i had a fair number of failures to extract that frequently lead to double feeds. I shot right around 250 rounds. Out of a 11.5 barrel POI was a couple inches lower than zero, but was able to stay on a steel silhouette at 100yds. Good enough.
I disliked how the bolt does not activate the Bho, so when you drop an empty magazine, the bolt closes, and you must charge the rifle. This changes my mag change routine. I also found that the bolt cycles WAY faster than normal. While quite fun, I had to remind myself to slow down during fire and movement drills, and not just impatiently doubletap every shot.
When cleaning, i found that the chamber adapter had split. CMMG quickly and politely replaced it.
The next time out i shot around 200rounds, this time mostly out of a 7.5" pistol, with only a couple assorted malfunctions, much less than before. Flash and report wad quite deceptive, making it a bit of a shock going back to 5.56!
I will continue to use this kit, and do feel that it will help me meet my goals of shooting more, despite its few problems.
