Brownells 75th Anniversary - A Shooting Heritage

A Solid Foundation for Your Next Custom Build

Sometimes you want the latest, updated, tweaked component, and sometimes you need a basic stripped receiver where the production effort goes into quality, rather than bells and whistles. The Brownells M4 Stripped Upper Receiver is that component - the perfect starting point for many an AR-15 build.

Starting with a 7075 T6 aluminum forging, our stripped M4 flattop upper is precision machined to final dimensions that make it compatible with the multitude of available ""mil-spec"" AR-15 components. It has a matte black, Type III hardcoat anodized finish, mirroring the military requirement.

  • Machined from 7075-T6 aluminum forging
  • Matte black Type III hardcoat anodized finish
  • Mil-spec dimensions for maximum parts compatibility
  • Standard .250"" dia. pivot/takedown pin holes
  • Inside our upper features M4 feed ramps to aid in chambering during high rates of fire.

Please note: this is a truly stripped upper receiver, with NO forward assist or ejection port cover installed, so you can truly customize every aspect of your rifle. The Brownells M4 Stripped Upper Receiver is a top-tier upper receiver, at a great price.


Online Only
In Stock

Cartridge: 5.56 mm NATO

Finish: Black

Style: Stripped