Upper Receivers

M4E1 Threaded Complete Upper, 18" .223 Wylde SS Rifle Length Barrel, ATLAS R-ONE 15" M-LOK HG - Anodized

Bootleg AR15 Stripped Billet Upper Receiver - Black The Bootleg Billet Upper Receiver is a purpose-built upgrade for AR-15 platforms, offering exceptional durability and refined handling in a minimalist package. Engineered from premium billet aluminum...

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...

NOTE: This part features a colored anodized finish. These finishes are held to different aesthetic standards than parts finished in black anodizing or Cerakote. For more information on colored anodizing visit our Knowledge Center. Our state of...

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...

Aero Precision, Stripped Upper, Flat Dark Earth, Special Edition Texas 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,...

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 handles and performs. Aero Precision products have been recognized across the country by members of the military and law...

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...

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...

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...