it didnt use to jam, my brother and his friend took it upon themselves to use my gun instead of their own and brought it back to me and said they were messing with it and something flew off the gun... my brother and his friends are two of the biggest idiots i know and wont tell me the whole story but i looked it over and found out the piece that is now missing is the little extractor that sits on the end of the bolt and grabs the shell to fling it out. the parts are only like 9 bucks and its a very accurate gun also so why scrap it for a new gun when it would only cost 9 bucks for the new parts