Somebody on here ask about is there anything they make anything that protects the lower receiver from the charging handle that makes contact and and wears the finish off the lower receiver there. I just ran across these the other day on Amazon and thought I would put them up in case the gentleman was still looking for something to do that. Comes with 6 pieces if I am reading it right and the cost is 11 bucks and some change. I just run across these by chance and remembered him asking about them I don't know who it was. But here they are if he's still interested.