The Battle Arms Development Workhorse complete lower receiver (brand part no. WH-LR-R-B5) arrives fully assembled with a B5 Systems Bravo stock installed, so it’s ready to mate directly with a rifle upper without sourcing a separate parts kit, buffer, or stock. Battle Arms Development builds the Workhorse line for shooters who want a dependable, no-fuss lower that’s ready to run out of the box rather than a bare receiver requiring assembly. The B5 Systems Bravo stock is a proven, adjustable design favored for its solid cheek weld and simple length-of-pull adjustment. Among the complete lowers in the AR15 lowers category, the Workhorse is built for builders who want to skip the parts-kit assembly step entirely.

Key Specifications

• This lower ships fully assembled and complete, ready to mate with a rifle upper.
• It comes with a B5 Systems Bravo stock already installed.
• The receiver is multi-caliber compatible with standard AR-15 upper and bolt combinations.
• It is built for semi-automatic AR-15 platforms.
• Machined from forged 7075-T6 aluminum for a durable, mil-spec-pattern foundation.
• Finished in a Type III hard-coat anodized black coating for wear resistance.
• Fitted with enhanced takedown and pivot pins for tool-less breakdown.

Frequently Asked Questions

Does this lower ship complete or stripped? It ships complete and fully assembled, ready to mate with a rifle upper.

What stock comes installed? A B5 Systems Bravo stock is installed at the factory.

Do I still need a lower parts kit? No, this lower is fully assembled and ready to accept a rifle upper.

Buy the Battle Arms Development Workhorse Complete Lower, B5 Bravo Stock

A fully assembled lower with a proven B5 Systems Bravo stock lets you skip the parts-kit build step entirely. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.