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San Tan Tactical's STT-15 stripped lower receiver was engineered for those who refused to compromise on ambidextrous AR platform functionality. Born out of the simple idea that every operator should have equal access to rifle controls regardless of which hand they shoot with, the STT-15 provides a true alternative to forcing left-handed shooters to add expensive parts just to operate their rifle naturally.
This is a billet lower receiver machined from a single block of 7075-T6 aerospace grade aluminum using CNC precision. The material itself is the same aluminum that military M4 carbines use, and the manufacturing process holds extremely tight tolerances that you'll feel the moment you handle it. The finish is Mil-Spec MIL-A-8625 Type III hard anodizing in Olive Drab Green, which provides durability and that tactical aesthetic without sacrificing substance. The receiver ships stripped, meaning no internal parts are included, giving you complete control over your trigger group, safety, and all other fire control components.
The standout feature is the ambidextrous design thoughtfully machined into the receiver itself. Bolt release buttons sit on both sides, magazine releases are integrated on each side, and quick detach sling attachment points are positioned to work naturally from either shoulder. You're not adapting your rifle to your hand, the rifle adapts to how you shoot. The magazine well is also flared at 1.38 inches, making reloads faster and more positive regardless of which side you're working from.
Since this is a stripped receiver, you'll need a lower parts kit with a trigger, hammer, and springs, plus a buffer tube assembly and stock to complete the build. Compatibility is straightforward, as the STT-15 works with standard mil-spec AR-15 components and accepts all common STANAG pattern magazines. The receiver supports mil-spec buffer tubes and stocks, whether you prefer a collapsible carbine setup or fixed rifle configuration.
You'll need a lower parts kit that includes a trigger, hammer, pins, springs, safety selector, and magazine catch. You'll also need a buffer tube assembly (buffer, spring, tube, and castle nut) and a stock or brace. The STT-15 works with standard mil-spec parts, so you have flexibility in choosing components that match your build goals and budget.
Yes. The STT-15 features bolt release and magazine release buttons on both sides of the receiver, plus multiple QD sling attachment points positioned for natural operation from either shoulder. You can shoot, reload, and manipulate controls with the same efficiency from your dominant or non-dominant hand without needing to add extra parts.
The STT-15 accepts all standard STANAG pattern M16/AR-15 magazines, including mil-spec 20 and 30-round mags, Magpul P-MAGs, and other AR-pattern magazines. The generous 1.38-inch magazine well flare makes loading faster and easier from either side.
Yes. The STT-15 lower receiver is designed to pair with any standard mil-spec AR-15 upper receiver. The platform uses mil-spec tolerances and dimensions, ensuring reliability and compatibility across the board.
The STT-15 is machined from a single block of aerospace-grade 7075-T6 aluminum on precision CNC equipment, not forged like many standard lowers. This billet construction allows for tighter tolerances, integrated ambidextrous features that would otherwise require multiple add-on parts, and superior fit and finish. San Tan Tactical also backs each receiver with a lifetime guarantee.
The receiver comes finished and ready to use. It features hard anodized Olive Drab Green coating that's durable and protective. No finishing, anodizing, or refinishing is required, though you can remove the anodize and apply Cerakote if you prefer a different color.
| UPC | 687051693506 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | STT15-LOWER-ANO-OD |
| Color | Olive Drab Green |
| Caliber/Gauge | Multi |
| Action | |
| Model | |
| Product Type | Stripped Lower Receiver |
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