Through the constant assembly & disassembly developing my rifle through the different stages of CO2 Into HPA I managed to wear out one of my parts... When I manually(Thank God!) Turned on the bottle the adapter into the gun 'Jumped' a thread.... I realized the possible danger and turned off the bottle immediately decreasing MOST of the risk.... That WAS the last time I shot it... After 10-12 years I came across a box of stuff that had the little CO2 12 gram adapter in it and thought what the heck lets hook it up... it sealed and held pressure with the first and only cartidge... Loaded up a .308cal round ball and shot it halfway through a thick telephone book... I do have to admit that in the photo's my gun is all held together with electrical tape so I deserve all I get!!!!