not as bad as it sounds my buddy and i were at the range today, its his norc m4, any hooo we step up to the line to shoot i take 2 shots, he takes 2 i take 2... i look over and hes like dude its stoped... when he put the bolt back in after cleaning he put the firing pin retaining pin in on the right instead of the left so under recoil the pin came out a tick and flattened out aginst the bolt and reciever jamming the bolt half open. i got it apart but now the retaining pin is toast anyone got a spare or where to find one.


















































