Used Air Force Colt 604 upper. The bore is in very good shape but the exterior is pretty worn. It is your typical carried alot and shot little upper. The barrel is marked C MP C. SOLD PENDING FUNDS
Used GUU-5P upper. This is a Colt 604 upper receiver with a Colt M4 barrel(14.5") 1/7 twist chrome lined attached. Can only be used on a registered SBR or pistol unless a longer flash hider is attached. Sold Pending Funds
Please contact through IM only since emails don't make it through my spam filter.