Upper Receivers

FN M4 upper receiver – Cage Code: 3S679 Part: 36295 -M4 feed ramps -Anchor Harvey Forge Marked -Engraved t marks -Hardcoat anodized black -FN Logo engraved on top rear of receiver (NO FWD ASSIST OR PORT DOOR INSTALLED/INCLUDED)

Start your new build with a Luth-AR .223/5.56 A3 Flattop Upper Receiver comes fully assembled with an M4-type feed ramp, 12 position Picatinny accessory rail for mounting scopes or flip-up sights. Shell deflector, forward assist, and ejection port cover...

The Aero Precision XL Upper is forged from 7075-T6 aluminum and features an enlarged ejection port, the XL Upper Receiver is your best choice when you're planning a build to send big rounds down range. Features: Port door opening enlarged to enhance...

Wilson's Forged Upper Receiver is a M4 Mil-Spec, flat-top upper receiver precision CNC machined from 7075-T6 aluminum forgings for maximum durability and Mil-Spec Type 3 hard coat anodized in rugged black. Whether you are building a match upper or a...

Building a bench gun or varmint rifle? Have a 50-year old axe to grind with the military for insisting on a forward assist? Whatever the reason, Nordic's extruded upper provides an economical option for those ARs that just don't need all those other bits...

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,...

The KE-15 forged flat top complete upper receiver is precision machined from 7075-T6 forgings to MilSpec standards, made to fit all M16/M4 rifles and carbines. Featuring USGI type T marked top, making it easy to remount any of your tactical accessories...

The Slick Side KE-15 Forged flat top upper receiver is precision machined from hi grade 7075 forgings to MilSpec standards, made to fit all M16/M4 rifles and carbines. M4 feed ramps machined in. Features USGI type T marked top, making it easy to remount...

The stylization of the YHM Second Billet Upper Receiver is reminiscent of the YHM SLR handguards. Because YHM was working with Billet 7075-T6 Aluminum it gave them the ability to really create an eye catching upper receiver. This upper is made from...

The Billet-AR upper receiver set is 100% machined in the USA and was engineered from the ground up to address structural design weaknesses in standard USGI receivers and enhance overall tolerances. It has a precise bolt raceway for smoother chambering,...