Saw this at a local shop and couldn't pass it up, I've always wanted one since i saw a buddy's dads back in high school, its a little rough but but the price was fair. Took it to the range this morning and it shoots very nice but doesn't stay open for the single shot function, just semiauto in both positions. Im going to take her all the way down and see what i can see. When i cycle it by hand it works as it should just not with live ammo, Any ideas?