Built a dedicated 22 lr ar-15. The first time out it shot like a dream. Second time out I had a few problems and anything after that was just a pain in the A55. I swapped out springs, adjusted springs, polished this and tweaked that. Now, what I want to know is what are the differences in the 22 conversions. Could i use the barrel collar from one kit and swap it to another kit. Will my dedicated barrel work with another kit? Or should I go with a full blown 5.56.: Wanna kill these ads? We can help!