Nearly new 6450 all factory Colt 9mm. upper cut to 10.5" by <AR-15 Barrels.com>.
Perfect and lightly used. Never on a sub gun. Good as a factory new sub gun upper but missing the forward markings. Used suppressed, the threading is concentric. Complete with a custom thread protector or standard flash hider. Click on photo.
550.00 complete and delivered. Trade considerations limited to possible 700 VS in 223, or Armalite Ban Era 16" upper.