San Tan Tactical, STT-15 Billet Lower Receiver, Multi-Caliber, Black Anodized Finish

The San Tan Tactical STT-15 Billet Lower Receiver delivers exceptional craftsmanship, rugged durability, and tight tolerances for serious AR-15 builders. Precision CNC-machined from a single piece of 7075-T6 billet aluminum, this multi-caliber lower receiver is built for strength, reliability, and long-term performance. Its sleek black hardcoat anodized finish not only adds corrosion resistance but gives your rifle a clean, professional look.

Perfect for custom builds, tactical applications, or competition rifles, the STT-15 sets the standard for premium billet AR lowers.

San Tan’s STT-15 Billet Lower features an ambidextrous design for your AR-15M4 platform, which allows it to accommodate any and all shooters without the need to add countless costly add-ons. It is directly from a billet of 7075-T651 aerospace grade American aluminum and holds ultra-tight tolerances. The finished receiver is then finished in Mil-Spec, MIL-A-8625 Type III hard anodizing. The STT-15 is everything you have come to expect from a San Tan Tactical, and then some. NOTE: Requires a lower parts kit, buffer & stock of your choosing to complete.

San Tan Tactical STT-15 Billet Lower Receiver – Multi-Caliber | AR-15 Platform | Black Hardcoat Anodized | Precision CNC-Machined

San Tan’s STT-15 Billet Lower features an ambidextrous design for your AR-15M4 platform, which allows it to accommodate any and all shooters without the need to add countless costly add-ons. It is directly from a billet of 7075-T651 aerospace grade American aluminum and holds ultra-tight tolerances. The finished receiver is then finished in Mil-Spec, MIL-A-8625 Type III hard anodizing. The STT-15 is everything you have come to expect from a San Tan Tactical, and then some...

Key Features of San Tan Tactical, STT-15 Billet Lower Receiver, Multi-Caliber, Black Anodized Finish:

• Platform: AR-15

• Caliber: Multi-caliber compatible – .223 Rem, 5.56 NATO, .300 BLK, and more

• Material: Aerospace-grade 7075-T6 billet aluminum

• Finish: MIL-SPEC Type III Class 2 hardcoat anodizing – matte black

• Design: Oversized and flared magwell for faster reloads

• Tension Screw: Adjustable receiver tension screw to eliminate upper/lower slop

• Integrated Features: Enhanced trigger guard, beveled edges for comfort and control

• Compatibility: MIL-SPEC parts and upper receiver compatibility

• Made in the USA – engineered and manufactured by San Tan Tactical in Arizona

Why Choose the STT-15 Billet Lower?

The San Tan Tactical STT-15 is a go-to choice for builders who demand flawless machining, a tight fit, and high-end performance. It’s a high-quality foundation for any precision AR build, blending aesthetic appeal with combat-ready features.

Also Available :

Spikes AR-15 Lower Receiver Stripped, Punisher Logo

Black Rain BRO Milled Strtipped Lower Receiver AR-15 223/5.56mm Black Hard

SHARPS BROS LLC Warthog Stripped Lower AR-15 Multi-Caliber Black Hardcoat Anodized

Spikes Lower Receiver Stripped 9mm, Glock Mag

Spike’s Spider AR-15 Stripped Lower Black, Color Filled

Spike’s AR-15 Stripped Lower, Calico Jack Flag, Color Filled, 223/556

Spikes Tactical Crusader AR-15 Lower Receiver, Multi-Caliber

Anderson Complete AR-15 Lower Receiever, .223/5.56x45mm, Black, Mil Spec

AERO Stripped AR-15 Gen 2 Lower Receiver, Multi-Caliber, Black Aluminum

FN FN-15 Stripped Lower Type 3 Hard Anodized

Spikes Lower Receiver Stripped-Calico Jack Logo

Ambush Tactical Stripped AR-15 Lower Receiver, Multi-Cal

Buy Spike’s Tactical Viking Stripped Lower Receiver – .223/5.56mm, Mil-Spec, Black, Non-Colored

Yankee Hill Machine AR-15 Stripped Billet Lower Receiver

Smith & Wesson MP15 Complete Lower Receiver 5.56x45mm NATO, Black Aluminum, Collapsible Stock

Spikes Tactical Pipe Hitters Union Joker Stripped Lower Receiver – Multi-Caliber | Custom AR-15 Platform

Spikes Tactical Snowflake Stripped Lower Receiver – Multi-Caliber | AR Platform | Black Hardcoat Anodized

LWRC IC Complete Lower Receiver – .223 Rem/5.56x45mm NATO | LWRCI Stock & Trigger Guard | Black Finish

Odin Works OTR-15 Billet Receiver Set – 5.56x45mm NATO | Precision-Machined | OD Green Finish

Sharps Bros Badlands “The Jack” Stripped Billet Lower – .223 Rem / 5.56x45mm | Tan Cerakote | Skull Design

Sharps Bros SBLR07 Gen 2 Overthrow Stripped Billet Lower – .223 Rem / 5.56x45mm | Bronze Cerakote | Spartan Helmet Design

PWS MK1 Mod 2-M Complete Lower Receiver – Multi-Caliber | Kodiak Brown | B5 Bravo Stock

Aero Precision M4E1 Stripped Lower Receiver – Multi-Caliber AR-15 | Flat Dark Earth | Enhanced Design

Spikes Tactical No Logo II Stripped Lower Receiver – AR-15 Multi-Caliber | Black | Clean, Sterile Design

Spikes Lower Receiver Stripped ST-15 Spider, Bullet Marking

POF P415 Gen 4 Stripped Lower Receiver – Multi-Caliber | Burnt Bronze Cerakote | Ambidextrous Design

Sharps Bros “The Jack” Stripped Lower Receiver – AR-15 Multi-Caliber | Black Hardcoat Anodized | Skull Design

Grey Ghost Precision AR-15 Billet Receiver Set 223 Remington/5.56x45mm,Flared Magazine Well

Angstadt Arms Lower Receiver AR-15 Platform 9mm, 7075 T6 Alum, Black Hardcoat Anodized, Accepts Glock Mags

Franklin Armory Libertas Complete AR-15 Billet Lower W/ Franklin BFSIII Binary Firing System

ET Arms Plum Crazy Gen II AR-15 Complete Lower, Polymer, Nano Lower Parts Kit, M4 Stock

Fortis Manufacturing, License Gen 2, Lower/Upper Receiver Set, 5.56 NATO, Black, Anodized Finish, Carbon Fiber, Ambidextrous Mag and Bolt Release