The SA-15 Complete Folding Lower Receiver is a premium, fully-assembled AR-15 lower receiver featuring Shield Arms’ patented built-in folding mechanism. Unlike adapter-based folding systems, this innovative design integrates the folding capability directly into the receiver, eliminating 0.5+ pounds of unnecessary weight while providing compact storage and transport.

Perfect For:

• Shooters seeking maximum portability without weight penalty
• Vehicle and backpack carry applications
• Complete builds requiring premium components

Premium Complete Lower with Integrated Folding Technology

The SA-15 Complete Folding Lower Receiver represents a significant advancement in AR-15 design, combining Shield Arms’ patented folding mechanism with premium components from industry-leading manufacturers. Machined from 7075-T6 aircraft-grade billet aluminum and finished with mil-spec hard-coat anodizing, this complete lower delivers exceptional durability and reliability. The built-in folding mechanism is not an aftermarket adapter—it’s engineered directly into the receiver design, resulting in a cleaner appearance, reduced weight, and improved structural integrity compared to conventional folding adapters.

This complete lower arrives ready to mate with your upper receiver, featuring carefully selected components that enhance performance and usability. The B5 Systems Bravo buttstock provides robust, comfortable shouldering, while the ALG Advanced Combat Trigger delivers crisp, consistent trigger control. The Radian Safety Selector offers ambidextrous operation, and the B5 Systems grip ensures secure handling in all conditions. Every component is assembled to exacting standards and backed by Shield Arms’ 100% lifetime warranty.

Designed for shooters who demand the ultimate in portability without compromising on quality, the SA-15 accepts all standard AR-15 magazines and is compatible with most aftermarket parts. The precision-machined magazine well features a beveled feed lip for rapid reloads, while thoughtful engineering touches like the threaded takedown pin hole and upper tension screw allow for perfect customization of fit and function. At just 2.45 pounds, this complete lower provides a lightweight foundation for any build while maintaining the strength and durability required for serious use.

Key Features

• Patented Built-In Folding Mechanism: Integrated design eliminates the need for external adapters, saving 0.5+ pounds compared to popular folding adapter systems
• Premium 7075-T6 Billet Aluminum: Aircraft-grade material machined to tight tolerances for superior strength-to-weight ratio
• Mil-Spec Hard-Coat Anodized Finish: Matte black Type 3 Class 2 anodizing per Mil-8625 specification provides exceptional corrosion and wear resistance
• B5 Systems Bravo Buttstock: Durable, lightweight carbine stock with secure locking mechanism and storage compartment
• ALG Advanced Combat Trigger: Crisp, clean trigger pull
• Radian Ambidextrous Safety Selector: Precision-machined safety for both left and right-handed shooters
• Proprietary H2 Buffer: Optimized buffer weight included for reliable cycling across a wide range of configurations
• Enhanced Fitment Features: Upper tension screw, and threaded bolt catch pin for perfect fit
• Universal Compatibility: Accepts standard AR-15 magazines and works with most standard and aftermarket AR-15 components
• Precision Magazine Well: Beveled feed lip design facilitates fast, fumble-free magazine changes

Specifications

Caliber Marking: Multi
Material: 7075-T6 Aircraft Grade Billet Aluminum
Finish: Matte Black Hard-Coat Anodized (Mil-8625 Type 3 Class 2)
Buttstock: B5 Systems Bravo Carbine Stock
Trigger: ALG Advanced Combat Trigger
Safety Selector: Radian Ambidextrous Safety Selector
Grip: B5 Systems Grip
Buffer: Shield Arms Proprietary H2 Weight Buffer (included)
Magazine Compatibility: All Standard AR-15 Magazines
Weight: 2.45 lbs (complete assembly)
Warranty: Lifetime
Made in the USA

Item must ship to an FFL dealer. Must be 21 to purchase. Please have your dealer E-mail or fax a copy of their license, including your name and order number, to us at sales@jsesurplus.com or fax to 636-547-2618. Please include YOUR dealers’ info in the SHIPPING OR comment section during checkout.