I've got one in .22cal. I bought it used from AOA, good people, great service. I'm guessing it was a trade in on a more reliable gun. Mine is a leaker,no more than 400 rounds and began to somewhere deep in the bowles of it. After trying to fix it myself, I know not recommended but didn't want the down time. I finally sent it in for work, no cost, warranty covered it, great speedy service. When I got it back worked for 3 shots, same problem, back to AOA, waiting for it to be returned. I don't know if there are design flaws with the gun, they did one upgrade on it. It's a gas when it works. I have said I would buy another but have since changed my mind, unless I was assured the problems have been rectified. My peeves with it were wishing the safety was on the right side so that I could operate with my trigger finger, trigger improvement and a cut out on the magazine housing to facilitate emptying the magazine. I hope they get the bugs worked out than it would truely be a great gun.