The Shield Arms SA-15 Stripped Lower Receiver (part no. SA-15-SLU) is the side-folding version of Shield Arms’ SA-15 lineup, machined from aluminum and finished in black anodized to match the standard, non-folding SA-15 lower. It is multi-caliber compatible, accepting standard AR-15 pattern uppers regardless of chambering, and machined to Shield Arms’ standard semi-automatic-only civilian specification. This side-folding configuration is built for builders who want a folding stock option; Shield Arms also offers a fixed, non-folding SA-15 lower for those who do not need that feature.

Key Specifications

• Machined from aluminum with a black anodized finish.
• Built as the side-folding configuration of Shield Arms’ SA-15 lineup.
• Built to Semi-Auto AR-15 pattern specifications.
• Multi-caliber compatible with standard AR-15 pattern uppers.
• Ships as a stripped lower receiver, ready for your parts kit and stock.
• Machined from 7075-T6 billet aluminum for a strong, precision-fit receiver.
• The folding mechanism is machined directly into the receiver, not a separate bolt-on adapter.
• Ships with a proprietary H2-weight buffer matched to the folding stock system.
• Chambered for .223/5.56, .300 Blackout, 6.5 Grendel, and 7.62x39mm uppers.

Frequently Asked Questions

Is this the folding or non-folding version? This is the side-folding configuration of the SA-15 lower.

What calibers does it support? It is multi-caliber compatible with standard AR-15 pattern uppers.

Does it ship with internal parts? No, it ships stripped and requires a lower parts kit, buffer, and folding stock to complete.

Buy the Shield Arms SA-15 Side Folding Lower Receiver

Build on a proven Shield Arms receiver. Browse more AR-15 lower receivers and order from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.