Details

Caliber: 5.56x45mm

Ecommerce Platform: AR-15

Firearm Action Type: Semi-Auto

Shipped Magazine Capacity: 30

Quantity of Magazines: 1

Muzzle Thread: 1/2-28

Barrel Length: 16

Stock Manufacturer: Magpul

Fire Control Group: Single-Stage Trigger

Features

San Tan Tactical's STT15 5.56x45mm AR-15 Rifle is engineered for precision, durability and top-tier performance. Built with true matched, hand-finished pillar billet sets, the STT15 lower features a fully ambidextrous design with three QD attachment points for seamless adaptability. The upper is expertly machined from a single solid block of 7075-T6 Certified Aerospace Aluminum, delivering exceptional strength and reliability. Every critical surface, including the bore, receiver extension face, barrel nut threads and barrel extension surfaces, is machined in a single operation to ensure perfect alignment with the barrel assembly. Each receiver set is serial number matched and hand-ground for an optimal fit, refined finish and consistent long-term accuracy. Completing the rifle is the San Tan 5.56x45mm barrel, precision-machined from 41V50 vanadium steel with 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 unmatched 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

A Type III, Class 2 hardcoat anodized olive drab green finish offers a rugged and tactical appearance