I bought it, installed a 9ball tight bore barrel ($30) and Maple Leaf 50° bucking ($10) and now it double feeds 1-2 times per magazine, usually at the beginning of the mag. All 20-something other bbs work fine, just sometimes hangs on those first shots. It must just not like that bucking, or perhaps I installed it wrong, either way I don't have time to tinker with it so my loss is your gain. No Magazine, have 2 available for additional charge.