Recently a friend of mine bought a beautiful Bushmaster post ban M4. We're curious though about the paint on the upper. I'm not sure what the true name of this piece is, but it's the piece that sticks out behind the efection port. I understand that it is normal for ejected cases to hit this, I'm sure that's what it's for, but is it normal for the paint to dissentigrate so rapidly? We only shot about 130-150 rounds through it, and the paint is now gone in the immediate area.
I have a 16" Bushmaster carbine, have had it about a year and a half. The cases hit about the same spot on my Bushy, but the paing is still going strong. Infact, after shooting, I usually have the brass markings in about the same spot as where the paint is missing on my friend's, but the markings come right off with CLP when I clean the rifle. My buddy's is not markings, the paint is just gone.
I know this is only cosmetic, and it really shouldn't matter, but it is a $900 rifle, and it would be nice to keep it looking new for a little while anyway.
Do I have just a really tough paint job on mine, and my friends is just normal, or what?
PS: That little divet, or nick, on the bottom of that piece was there when the rifle came in, that was not produced by the shell casings. But it kinda makes you wonder if the metal in that area is a little soft or something.