So the other day I learned how my sks has a free floating firing pin, and can cause slamfires if I don't take the bolt apart and remove the cosmoline. To get at firing pin out there is a small pin that just has to be punched out which a punch and mallet is needed. I just started doing very very minimal gunsmithing, but I really enjoy it so I was thinking about picking up a gunsmithing kit at cabelas or something. Are there specific tools that are a must have for any gunsmith? Basically the wd-40 and duct tape of the gunsmithing world.