Complete Uppers

Colt's Manufacturing, Complete Upper Reciever, Fits AR, 223 Rem/556NATO, 14.5" Chrome Lined Barrel, 1:7 RH Twist, Magpul Flip-Up Rear Sight, M4 Contour Barrel, Standard Sling Swivel, Bolt Carrier Assembly and Charging Handle, Black Finish, Not Pinned and...

Colt Complete 223/5.56 16" Upper receiver with Centurion M-LOK rail, BCG and Charging handle.  

High quality components and precise manufacturing makes Colt Products ideal for both new shooters and experienced gun owners. The durability, reliability and excellent build quality will provide years of service you can count on...

Colt's Manufacturing, Complete Upper Receiver, 223 Rem/556NATO, 16.1" M4 Barrel, Black Finish, A2 Fixed Front Sight, Magpul BUIS Rear Sight

Use what "THEY" use. The Daniel Defense MK18 Upper Receiver Group features the railed forend Daniel Defense currently provides to USSOCOM and a 10.3" Cold Hammer Forged Barrel. The MK18 Rail Interface System (RIS II) features the Bolt-Up System has...

Knights Armament Company SR-15 CQB Mod 2 Complete Upper 11.5" 556 The SR-15 E3 Mod 2 series' 5.56 mm NATO barrel is manufactured for military grade durability, and is free-floated inside a URX4 M-LOK handguard. An improved E3 round-lug bolt design both...

The MK111 PRO Upper, features the PWS long stroke piston system. Internally, this line offers the tried and true system. Featuring a free-float MLOK handguard, with the fully forged upper. The MK111 Pro is a no-nonsense tool for when you need a high...

The PWS MK1 PRO line features the tried and true PWS long stroke piston system. This line is perfect for shooters looking for a cost-effective piston system firearm without sacrificing the high-quality standards PWS has been known for over a decade...

  Seekins Pro Series 12" 223 Wylde Complete Upper The SPROV3 is designed to use on its own or with a suppressor. It is configured to keep the overall length to approximately that of a standard carbine by the use of a 12 inch barrel and the Seekins...