Another club mate was having problems with accuracy on his, this one in .22 and was shotgun spreading. On inspection the pellets were clipping the muzzle/air stripper, I took it off and accuracy was excellent. Didn't want to risk screwing a mod onto it to decide whether it was the threads on the barrel or the stripper. I suspect it's the barrel threads. Maybe this is the cause of the many guns accuracy problems? His had a alloy scope rail and apart from the thread issue I loved shooting it