Complete bolt and carrier assembly. Upgrading to a NM bolt and carrier. 4-500 rounds through it. Very good condition, no real wear marks at all. Gas key is staked. Semi-auto style.
Unsure about the manufacturer, DPMS if I remember right, but cannot be sure.
I can get pics if needed, it is what it is, a bolt and carrier assy, nice and clean.
Postal M/O. Don't want to mess with paypal.