I have a used 16" OEM Sig carbine barrel for an MPX (9 mm) with the piston and the gas plug. This is a factory pinned and welded barrel with a flash hider on the end. I replaced it with a barrel that didn't have to be pinned and welded. So, this is an extra. It's perfect for converting a pistol to a rifle or as a replacement barrel or to get rid of the early carbine barrel with the three prong flash hider that would ring like a tuning fork with every shot. It's in very good condition. Pics on request.

$599 plus freight