San Tan Tactical STT-15 5.56 10.5″ 30rd MC Black

Description

If you’re looking for a compact AR platform that’s built to run hard and run clean, the San Tan Tactical STT-15 5.56 10.5″ 30rd MC Black is exactly what I’d hand you from behind the counter. This isn’t a parts-bin build — it’s a purpose-engineered short-barrel rifle (SBR or pistol configuration depending on your setup) from a shop that knows billet receivers inside and out. Chambered in .223 Rem/5.56 NATO, it comes with a 30-round magazine and that tough-as-nails MultiCam Black Cerakote finish. Whether you’re setting up a truck gun, a home-defense tool, or a compact duty carbine, this San Tan Tactical STT-15 5.56 10.5″ 30rd MC Black delivers the reliability you need without the extra weight.

Manufacturer	San Tan Tactical
Model	STT-15
Material	Billet 7075-T6 aluminum upper and lower receiver (per manufacturer specs)
Compatibility	.223 Rem / 5.56 NATO
Finish	Cerakote MultiCam Black
Weight	Approximately 5.8 lbs (as configured, per manufacturer specs)
Condition	New

Key Features

• Billet Receiver Set — Why it matters: Machined from solid 7075-T6 aluminum, this receiver is stronger and more precise than forged alternatives, giving you tighter tolerances and better long-term durability.
• Ambidextrous Controls — Why it matters: Left-handed shooters or anyone running a sling won’t have to break their grip to hit the bolt release or mag catch. It’s a small detail that makes a big difference under stress.
• 10.5″ Barrel with Carbine-Length Gas System — Why it matters: This length balances maneuverability in tight spaces with reliable cycling using standard 5.56 loads. It’s the sweet spot for close-quarters work.
• Cerakote MultiCam Black Finish — Why it matters: This isn’t just a paint job — it’s a corrosion-resistant, low-reflectivity coating that holds up to holster wear, scuffs, and rough handling better than standard anodizing.

Who It’s For

This San Tan Tactical STT-15 is for the shooter who wants a compact, reliable platform without cutting corners. It’s ideal for home defense, vehicle carry, or as a short-barrel rifle build that you can trust your life to. New gun owners will appreciate the ambi controls and simple manual of arms, while experienced shooters will respect the billet build quality and tight fit. If you’re building out a pistol-caliber carbine or a dedicated 5.56 SBR, this is the foundation you want.

Pros & Cons

• Pro: Billet receiver set means no casting voids or sloppy fits — you get a rock-solid platform right out of the box.
• Pro: Ambidextrous bolt release and mag catch make it truly lefty-friendly without aftermarket parts.
• Pro: MultiCam Black Cerakote is both tough and low-vis — it won’t shine under NODs.
• Con: At 5.8 lbs, it’s not the lightest 10.5″ build on the market. If you’re counting ounces for a backpack gun, you might look at a polymer lower. But for a billet gun, this weight is actually on the lean side.

Comparison

Feature	San Tan Tactical STT-15	Geissele Super Duty 10.3″	Zev Technologies OZ9C
Receiver Material	Billet 7075-T6 aluminum	Forged 7075-T6 aluminum	Forged 7075-T6 aluminum
Finish	Cerakote MultiCam Black	Black anodized	Black anodized
Ambidextrous Controls	Yes (bolt release + mag catch)	Yes (bolt release only)	No (right-handed only)
Barrel Length	10.5″	10.3″	4.5″ (pistol)
MSRP	$1,540.38	$1,890.00	$1,699.00

FAQ

Is the San Tan Tactical STT-15 5.56 10.5″ 30rd MC Black a rifle or a pistol?

This depends on your local laws and how you configure it. The receiver is stripped or complete as shipped — if you add a brace, it’s a pistol; if you add a stock and the barrel is under 16″, it’s a short-barreled rifle requiring a Tax Stamp. Always check ATF rules before building.

What magazines does this San Tan Tactical STT-15 accept?

It uses standard AR-15/M16 magazines. The included 30-round mag is a Magpul PMAG Gen M3, but it’ll run with any USGI or aftermarket .223/5.56 magazine you have on hand.

Can I swap the handguard on this STT-15?

Yes. The STT-15 uses a standard AR-15 barrel nut and a free-float M-Lok handguard. You can swap it for any compatible 7″ or longer handguard. Just note that the gas block is low-profile, so you have clearance for most aftermarket rails.

Does this come with a bolt carrier group and charging handle?

Our listing includes the complete upper and lower receiver set. The BCG and charging handle are included with the upper assembly — you get a nitrided BCG and an ambidextrous charging handle right out of the box.

Why Buy From Us

• ✓ Nationwide delivery (all 50 states)
• ✓ Ships 1–2 business days
• ✓ 30-day returns
• ✓ Secure checkout

Last updated: April 2026

According to NSSF data, over 60% of new gun buyers in 2025 chose a compact AR platform for home defense. The San Tan Tactical STT-15 fits that need perfectly.

Browse more: AR-15 Lower Receivers | Complete Uppers | AR-15 Parts & Accessories