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The San Tan Tactical STT-15L LT stripped lower receiver is engineered for anyone building a rifle where every ounce matters. Whether you're into 3-gun competition, hunting across rough terrain, or just want a lighter AR-15, this receiver delivers the goods. It tips the scales at just 7.7 ounces while maintaining the same sharp aesthetics and precision that San Tan Tactical is known for.
Machined from a solid block of 7075-T6 aerospace-grade aluminum using CNC equipment, this receiver holds tighter tolerances than standard mil-spec options. The LT designation means San Tan removed weight where it doesn't matter structurally, using lightening pockets throughout the design. You get an enlarged 1.38-inch magazine well that speeds up reloads without the bulk, plus an oversized winter trigger guard that works whether you're wearing gloves or not. Assembly is straightforward with no roll pins needed, instead using included threaded dowel screws.
The receiver includes integrated features that make assembly easier and faster. A bullet pictogram safety selector gives you visual guidance, while set screws let you fine-tune trigger creep and upper receiver tension without taking apart the whole gun. The captured rear takedown pin detent and spring stay put during assembly instead of launching across the room. Hard anodized in mil-spec finishes, this lower will handle years of use without drama.
Works with all mil-spec AR-15 and M16 components and standard lower parts kits. Magazine compatibility covers everything from basic 20 and 30-round mil-spec mags to Magpul P-MAGs, Surefire, and Beta magazines. The receiver does not include ambidextrous controls, so factor in selector and takedown pin components for a complete build. San Tan backs this receiver with a lifetime warranty that covers any defects in materials and workmanship.
No, this model does not include ambidextrous controls. It accepts all mil-spec AR-15 components though, so you can add ambidextrous selectors and controls from other manufacturers if needed. The stripped lower is designed to keep weight minimal by excluding those features.
You'll need a lower parts kit that includes the trigger group, hammer, disconnector, springs, selector switch, and takedown pins. Most standard mil-spec lower parts kits work perfectly. The lower comes with a threaded dowel screw for assembly instead of roll pins, which makes installation cleaner.
Yes, the STT-15L LT is multi-caliber compatible. It works with 223 Rem, 300 Blackout, 22LR, and other AR-platform calibers as long as you use the matching upper receiver and components for that caliber. The lower itself doesn't change.
It accepts a wide range of AR-15 magazines including mil-spec 20 and 30-round magazines, Magpul P-MAGs of any generation, Surefire magazines, and Beta magazines. The enlarged 1.38-inch magazine well actually improves magazine compatibility and speed during reloads.
The STT-15L LT weighs just 7.7 ounces. San Tan achieved this through strategic lightening cuts in the billet that don't compromise structural integrity. For comparison, standard mil-spec forged lowers typically run 10-11 ounces, so you're saving roughly 3-4 ounces without losing strength.
Yes, San Tan Tactical includes a lifetime warranty on this lower receiver covering defects in materials and workmanship. It's a solid guarantee that shows confidence in the product quality and manufacturing.
| UPC | 680599034039 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | STT-15L-LT-LWR |
| Action | |
| Caliber/Gauge | Multi |
| Color | Black |
| Model | |
| Product Type | Stripped Lower Receiver |
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