Upper Receivers

Aero Precision, Stripped Upper, Flat Dark Earth, For AR15 Precision machined M4 feed ramps Mil-spec dimensions Manufacturing a great receiver isn't just about what the end product looks like. It's about what it feels like, how it works, how it...

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 as our M4E1 Enhanced Upper Receiver but is threaded to...

Bootleg Mil-Spec Complete Upper, AR15, Flat Top, M4 Feed Ramps U.S.A. sourced 7075-T6 Aluminum Fully Assembled with forward assist, and ejection port cover Bead blasted and hard coat anodized black (Type III, Class 2 ) Upper receiver features M4...

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)

The AR15 Stripped Upper Receiver is one of our most popular products. Forged from 7075-T6 aluminum, this stripped upper is precision machined to mil-spec M16/M4 specifications and features M4 feedramps. Match this upper with one of our AR15 lower...

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...

LBE Unlimited is a leading producer of US Made gun parts and accessories, particularly for the AR-15 platform. Whether you're in the middle of an AR build or you're just looking to upgrade a key component, LBE has you covered with reliable parts and...

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