I wasn't quite sure where to post this question but since it has something to do with Rimfire, here it is. I have one of the gas operated Bushmaster M4-A3 rifles. I just ordered a .22 conversion but I do not know if the .22 rimfire would have enough power to operate the bolt. I am pretty sure the rifle has an adjustable gas system, but still I am not sure. Does anyone have the conversion and a gas operated rifle? Does it work without problems? Any information would be appreciated.