Folding Lower Receivers

A fully assembled SA-15 folding AR-15 lower with the patented built-in fold and no adapter. It comes with a B5 Systems Bravo stock, Radian ambi safety and H2 buffer installed. Add your upper. Ships to your FFL.

Built-in folding AR-15 lower receiver with SBA3 brace. Precision machined 7075-T6 aluminum, saves 0.5+ lbs vs adapters. Made in USA with lifetime warranty.

Patented SA-15 Stripped Folding Lower Receiver. No adapter required - revolutionary folding mechanism built into the receiver. 7075-T6 billet aluminum construction. Build your custom folding AR-15 rifle or pistol. Made in USA with lifetime warranty.

The SA-9 Gen2 is Shield Arms' patented folding lower receiver machined from 7075-T6 billet aluminum, designed to accept Glock double-stack 9mm magazines with integrated last-round bolt hold open and enhanced parts compatibility.

Build your own custom folding AR-15 with Shield Arms SA-15 Builders Kit. Features patented Folding Lower Receiver with integrated folding mechanism - no adapter required. Includes 7075-T6 billet upper and lower receivers, 15" M-LOK handguard, carbine buffer tube, proprietary H2 buffer, and thread locker. Lighter, stronger, and more compact than traditional folding adapter systems. Custom in-house Cerakote in Black, Fallout, Montana Mud, or Pineland. Made in USA with lifetime warranty.