Hi. I just bought a pre-ban M4-gery. It has a DPMS barrel marked "DPMS CAL.223 1-9". I'm assuming this isn't chrome lined. Does DPMS make a chrome lined barrel, and if so, would it be marked as such? It doesn't really matter to me.
I'm wondering if the upper is DPMS also. The only marking I can find is an "A" symbol, with the top part of the "A" being a filled in triangle. It came with a removable handle that is marked similar: "A-6". Can you tell from this if the upper is DPMS also?
I like the set-up, but the bolt carrier feels a little "grainy" when removing it or pulling the charging handle. Is this just normal and perhaps indicating the gun hasn't been fired much? Would a chrome carrier "feel" better?
I'm basically just trying to figure out exactly what I have here at this time, but also want to make sure everything is in order before I find a black rifle friendly range to go to. Thanks for any input you can give me :)