AR-15 9MM Stripped Billet Upper Receiver (Gen 2) (Anodized Black)

Description

This stripped billet upper receiver is machined for 9mm caliber builds and serves as the foundation for an AR-style pistol caliber carbine. Built from 6061 T6 billet aluminum, the Gen 2 design balances structural strength with a working weight of 7.2 oz, making it lighter than many forged equivalents without sacrificing rigidity under cycling forces.

The flat-top 1913 Picatinny rail runs the full length of the upper, giving you a continuous mounting surface for optics, magnifiers, or backup sights. Machined as a single piece rather than assembled from forgings, the billet construction eliminates potential weak points at traditional pinned joints. The finish is a hardcoat Black anodized surface, delivering abrasion resistance and corrosion protection across the aluminum.

As a stripped receiver, this component arrives without a forward assist, ejection port cover, or charging handle — you install those separately to match your build’s configuration. The large ejection port cutout accommodates 9mm brass, and the receiver face is designed to accept standard AR-pattern barrel nuts and handguards. Two indexing pin holes are machined into the upper to align with corresponding holes in a lower receiver, maintaining consistent lockup between the halves.

This Gen 2 revision refines the original billet profile, reducing material where it is not structurally required while maintaining full compatibility with mil-spec AR components. The threaded boss at the rear accepts a standard buffer tube assembly. Because this is a 9mm-specific upper, verify that your barrel, bolt carrier group, and magazine adapter are all designed for the same calibre before assembly.