Birchwood Casey Barricade (formerly Sheath) for exterior protection...TICO tool for the shotgun bore....I use Mercury Outboard Quicksilver 2 cycle racing oil for lube as it dissipates carbon the best of any gun oil tried (dissolves loctite) lightly oil, don't routinely disasemble... couple drops oil on action bars, bolt carrier rail, bolt body,extractor spring, cocking piece of .22...my STC 10/22 and M41 had a preference for HV Super-X, and I use Federal 100pack in the Benelli with light modified choke loctited in place

you will get difference in accuracy with how tight the mounting screw is adjusted, and how the forend of the stock bears on the barrel due to barrel harmonics... it will vary according to the speed of different brands of ammo