i have had a sub9 for 3 months. i like the gun, but it is not as reliable as i wished. it feeds great. the problem is the spent case will sometimes get caught in the bolt. kind of a sideways stovepipe. the next round has started into the chamber, the stopage is from the spent case. i have tried 5 kinds of ammo. the spent cases barely make it out of the rifle. i think the recoil spring is to strong. i keep it stored with the bolt pulled back. i hope it weakens the spring a little. 300 rds fired so far. no change. about 1 out of 20 rds do this. the barrel folds and locks tight. im pleased with that part. i have tried all kinds of teflon, lube, and anything else that will cause the parts to slide with less resistance. no luck. the same old thing. empty cases fall out at my feet. thought you all should know how mine has turned out. fun gun, but not for self defence i love my p32. it works every time!