San Tan Tactical's STT15 5.56x45mm AR-15 Rifle is engineered for precision, durability and superior performance. Built from true matched, hand-finished pillar billet sets, the STT15 lower is fully ambidextrous and features three QD attachment points for enhanced versatility. The upper is precision-machined from a single solid block of 7075-T6 Certified Aerospace Aluminum, ensuring exceptional strength and reliability. Every critical surface, including the bore, receiver extension face, barrel nut threads and barrel extension areas, is machined in one operation to achieve perfect alignment with the barrel assembly. Each serial-number-matched receiver set is hand-ground for optimal fit, refined finish and consistent long-term accuracy. Completing the build, the San Tan 5.56x45mm barrel is crafted from 41V50 vanadium steel, featuring a 1:7 twist, a 1/2-28 threaded muzzle and a dimpled surface for precise gas block alignment and retention. Designed for shooters who demand excellence, the STT15 delivers uncompromising reliability and performance.

STT suppressor optimized enhanced bolt carrier group improves suppressor efficiency and longevity
STT 5.56x45mm barrel for superior performance and accuracy
Equipped with a CMC Triggers Flat 3.5lb single-stage drop-in trigger for crisp, consistent performance
Magpul MOE grip and stock deliver ergonomic handling and stability for improved shooting performance
M-LOK handguard ensures a secure and customizable attachment system for tactical enhancements
Equipped with an ambidextrous charging handle for seamless operation from either side
Mil-Spec 6-position buffer tube with H1 buffer provides recoil control and adjustability
Precision CNC machined from Billet 7075-T6 certified aluminum for superior strength and durability
Features extended feed ramps for reliable and consistent feeding
Includes ambidextrous magazine and bolt release controls for improved functionality and ease of use
Desert multicam CeraKote finish enhances durability while providing a rugged, tactical look

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It is the customer’s responsibility for understanding state laws regarding all purchases made. For a comprehensive list of all Shipping Restrictions, please refer to our Shipping Restrictions By State Page found Here.

All NFA Rules Apply

These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

Magazines will be removed from firearms when shipping to states with magazine capacity restrictions.

California 10+ Round Magazine Buyers: PSA values your freedom and constitutional rights above all else. However, PSA will not accept new orders nor will ship any order until the Ninth Circuit Federal Court of Appeals mandate becomes finalized. Once this mandate is finalized, we will start accepting new orders and ship 10+ round magazines to California Customers.

WARNING: Handling firearms or firearms parts can expose you to lead and other petroleum products known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands thoroughly after handling. For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).