boresnakes are great because they keep you from damaging the rifling which is very easy to do. I think most people overlook how easy it is to ruin the edges of the lands. Other than that it dip-and-drip for the lube for me.
Use whatever rifle you happen to have access to. AR, AK, M1, M1A, M1carbine, any semi auto. Just go and have fun and don't worry about gear. Last month I saw a guy shooting an M1carbine with a scope. On the first stage the scope rattled loose and he finished the stage and match with just his...