Complete Uppers

Primary Weapons Systems, MK1 Mod 1 Complete Upper, 223 Wylde, 7.75" Stainless Barrel, 1:8 Twist, PWS Enhanced Bolt Carrier Group, M-Lok, Charging Handle, Black Barrel Length: 7.75" Caliber: .223 Wylde Weight: 3 lb. 8 oz. Length: 17" Piston...

Maxim Defense Industries, PDX Complete upper, 556NATO, 5.5", Black, AR Rifles HATEBRAKE installed under handguard M-slot compatible handguard Military grade materials [6Al-4V Titanium, 17-4 Stainless Steel, 7075 and 6061 Aluminum] HK height rail...

The Daniel Defense M4A1 Upper Receiver Group features the M4A1 Rail Interface System (RIS II), which has been in use by US Special Operations Command (SOCOM) for the SOPMOD II Weapons System since 2005. This two-piece, free-floating rail system allows...

The Daniel Defense M4 V7 Upper Receiver Group is built around a Cold Hammer Forged 16" Government profile barrel and equipped with a DD improved Flash Suppressor to reduce flash signature. It features a mid-length gas system for smooth, reliable cycling...

The MK1 MOD 1-M line, revamped for 2018, features the PWS long stroke piston system. Internally, this line offers the tried and true system that PWS owners have grown to know and love. Featuring a free-float MLOK handguard, forward assist controls, and a...

This Aero Precision M4E1 Threaded upper receiver group comes completely assembled with 16” 5.56 barrel and the ATLAS S-ONE M-LOK handguard. This barreled upper receiver group does not include BCG or charging handle allowing you to choose your...

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...