BCM M4 Upper Receiver Assembly — 7075-T6 Aluminum

Description

The Bravo Company (BCM) M4 Upper Receiver Assembly is a semi-complete AR-style upper machined to Mil-Spec standards from 7075-T6 forgings. It ships assembled with a forward assist and ejection port cover and features laser T-markings to aid optics remounting. The receiver includes a Mil‑Std 1913 rail for optics and accessory mounting and receives a hard coat anodized finish with dry film lube applied to the interior bore per Mil-Specs. This upper is machined for barrels that use an M4 barrel extension and is made in the U.S.A.

Key Specifications

• The receiver is machined from 7075 T6 aluminum.
• The finish is Hard Coat Anodized per Mil-A-8625F, Type III, Class 2.
• The assembly includes forward assist and ejection port cover.
• The top rail is a Mil‑Std 1913 rail for mounting optics and accessories.
• This upper is machined for use with barrels that use an M4 barrel extension.
• The receiver features laser etched T-markings to assist with optics remounting.
• The interior bore is treated with dry film lubricant per Mil-Specs.
• The product is made in the U.S.A.
• The listing does not include a bolt carrier group or barrel and requires additional components to complete a functional upper.

This BCM M4 upper provides a rugged, Mil‑Spec foundation for building or upgrading AR-style rifles where a precise fit to M4-style barrel extensions and repeatable optics mounting are priorities. Its combination of 7075-T6 construction, hard coat anodized finish and laser T-markings makes it suited for users who want a dependable, service-grade receiver to integrate with custom barrels, handguards and components.