Most of it is up in the action but pretty much everywhere including the tube and I think it's going in thru the bottom. My rem 870 has a cover there where as the mossberg doesn't. It is very sandy with out much green vegetation to keep it down. The slightest bit of wind blows it around. The 870 shoots 3" and I'm fixing to hand it down to my son. Figured I'd upgrade to the 3 1/2