I saw a carrier that wasn't all that shiny inside, and real rough machining too, should replace it, but it doesn't matter much, as I think it works fine... It is on a carbine build, so it gets plenty of gas.
:ROFL: I think it is actually on a sendra receiver, it is this funny purple color and the rear pin hole [connecting the upper to the lower] is egg shaped... Really crappy casting I'd assume.
so there are actually non-chrome lined carriers?
that is a wild thought. come to think of it BOHICA would be a good brand name for such an item!--lol!