Lots of good ideas here in this thread as far as maintaing your rifle barrel, so here is my .02. Since I have allready removed my end cap (free float of the barrel) I just use a small flat sponge, cut in a small square & just push the end of my cleaning rod into it then secure it with a couple pieces of duct tape (to hold it in place) then spray it with some CLP & run it down inside the hand guard against the barrel, a few swipes & your done, works great for me