The Battle Arms Development Authority Elite Ambidextrous Lower Receiver (brand part no. AUTH-LR) is a billet AR-15 lower built for shooters who want fully ambidextrous controls without hunting down compatible parts separately. Machined from 7075-T6 aircraft-grade aluminum and finished in black anodize, it’s designed as the foundation for a precision AR-15 build rather than a budget forged lower. Battle Arms Development built its reputation on ambidextrous selector and magazine release systems for competition and duty guns, and the Authority Elite carries that design language into a clean, ambi-ready receiver. Among rifle lowers, it suits builders who want left- and right-hand-friendly controls from the start rather than retrofitting them later.

Key Specifications

• Machined from 7075-T6 aircraft-grade billet aluminum for a stronger, tighter-tolerance receiver than a standard forging.
• Finished in black anodize for a durable, corrosion-resistant surface.
• Built with ambidextrous control compatibility, supporting left- and right-hand selector and mag release setups.
• Accepts standard Mil-Spec AR-15 lower parts kits and buffer tubes for straightforward builds.
• Sold as a stripped receiver, ready for the buyer’s choice of trigger, grip, and stock.

Frequently Asked Questions

Does this lower ship as a complete firearm or stripped? It ships stripped — you’ll need a compatible AR-15 lower parts kit, trigger group, and buffer tube or stock to complete the build.

Is it compatible with standard AR-15 upper receivers? Yes, it’s built to Mil-Spec dimensions and accepts standard AR-15 upper receivers and parts kits.

Buy the Battle Arms Development Authority Elite Lower Receiver

A billet 7075-T6 lower built around genuine ambidextrous control compatibility gives your next AR-15 build a stronger foundation than a stock forged receiver. As a firearm, this lower ships to your FFL — order it from our Lubbock, Texas gun shop and we’ll get the transfer moving as soon as it’s ready to ship.