Complete Uppers

Spikes complete upper assemblies will arrive to you inspected, tested, and ready to drop-in and go to work. Spikes maintains the same high standard of tolerances and attention to detail as the uppers they use for complete rifle builds. Every built upper...

The shortest of the non-NFA models with a removable muzzle device, the MK116 Upper is a crowd favorite. The MK116 is designed for a multitude of uses and retains lethal capability out to 500 meters with varying types of ammunition.

This complete upper includes Aero Precision's new ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. Aero Precision's proprietary...

The new Daniel Defense DDM4V9 Upper Receiver Group is designed to satisfy the needs of modern shooters not only in popular shooting sports but also for tactical and defensive applications. The long, 15" DDM4 quad rail over a 16" cold hammer forged...

FN America, Upper, Complete, 223 Remington, 556NATO, Black Finsh, 16" (14.5" Barrel With Pinned Brake), Anodized, Flat Top, No Sights

The NEW Maxim Defense PDX(TM) U.R.G is built to handle the fierce demands of the Tier 1 community and designed to install on any Mil-Spec lower receiver. With the PDX(TM) U.R.G, you dominate close quarter encounters and achieve maximum energy on target...

Maxim Defense - PDX 5.5" Upper 300 Blackout - Flat Dark Earth The NEW Maxim Defense PDX(TM) U.R.G is built to handle the fierce demands of the Tier 1 community and designed to install on any Mil-Spec lower receiver. With the PDX(TM) U.R.G, you dominate...

The Daniel Defense M4 V7 S Upper Receiver Group is built around a Cold Hammer Forged 11.5" Government profile barrel and equipped with a DD improved Flash Suppressor to reduce flash signature. It features a carbine length gas system for smooth, reliable...

Colt's Manufacturing, SP401491, Upper, 223 Remington, 556NATO, 14.5" Barrel, Matte Black Finish, No BCG Included, Troy Quad Rail, Fixed Front Sight, MA Tech Rear Sight

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,...

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...

The shortest of the non-NFA models with a removable muzzle device, the Primary Weapons MK216 Rifle is perfect for those wanting to suppress their MK2 rifle. The MK216 is designed for a multitude of uses and retains lethal capability out to 800 meters...