Add the Colt legend of reliability to your rifle or build with this 9mm upper receiver from Colt! A standard 9mm upper receiver complete with a 16.1 1-10 twist barrel Magpul BUIS sights and a standard handguard. All parts finished in black. All upper receivers include a charging handle bolt carrier group and back up sights. All NFA rules apply. - Cartridge: 9 mm Luger - Finish: Black - Length: 16 - Style: Complete - Twist: 1-10 - Made in the USA