The Spike’s Tactical Billet AR-15 Upper Receiver, Generation 2, Mil-Spec (brand part no. SFT52B2) is a stripped upper receiver machined from billet aluminum for the .223 Rem/5.56 NATO AR-15 platform. Spikes Tactical cuts the Generation 2 billet upper to mil-spec internal dimensions, so it accepts standard AR-15 bolt carrier groups, barrels, and handguards without custom fitting. As a billet part rather than a forging, it gives builders a clean canvas with crisp lines and tight tolerances for a precision or custom-look build. Because it ships as a stripped receiver only, it is meant to be assembled with a barrel, bolt carrier group, and the rest of the upper hardware to complete a build.

Key Specifications

• Compatible with the .223 Rem/5.56 NATO AR-15 platform.
• Machined from billet aluminum rather than forged, for tight tolerances and a clean, precise finish.
• Built to Generation 2, mil-spec dimensions, accepting standard AR-15 bolt carrier groups and barrels.
• Sold as a stripped upper receiver, without barrel, bolt carrier group, or handguard.

Frequently Asked Questions

Does this include a barrel or bolt carrier group? No, this is a stripped upper receiver only; barrel, bolt carrier group, and handguard are sold separately.

Will standard mil-spec AR-15 parts fit this receiver? Yes, it is machined to Generation 2, mil-spec internal dimensions, so standard AR-15 bolt carrier groups and barrels drop in without custom fitting.

Buy the Spike’s Tactical Billet AR-15 Upper Receiver, Gen 2

Start a precision AR-15 build with a billet upper receiver machined to mil-spec dimensions from the ground up. Browse Schaefer Defense’s AR-15 uppers selection and order from our Lubbock, Texas gun shop for fast shipping.