A while back I came across a very old Crosman bolt action pellet rifle when I was cleaning out my storage room at home, I can't exactly remember where I got it - probably picked it up at a yard sale 20+ years ago. To be honest, I don't know how to operate it. Yes I know how a bolt action works, but what do you have to do to make it fire? On the left side of the action is stamped " Crosman "177" " and below that on the tube it's stamped "MOD.113" " 271513". Any idea how old it is? More importantly, how does it work and if necessary where would I get seals and stuff for it?