Upper Receivers

The M4E1 Threaded Upper Receiver features a new angular machined design that helps it stand apart from standard mil-spec upper receivers. This upper receiver features the same enhanced body profile...

FN M4 upper receiver – Cage Code: 3S679 Part: 36295 -M4 feed ramps -Anchor Harvey Forge Marked -Engraved t marks -Hardcoat anodized black

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...

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...

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...

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...

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...

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...

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,...

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...

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...