San Tan Tactical STT-15 AR-15 Rifle, 6mm ARC, 18-Inch

The San Tan Tactical STT-15 in 6mm ARC (brand part no. STT-15-6ARC) is a semi-automatic AR-15 built around Hornady’s 6mm ARC cartridge, pairing San Tan’s high-quality firearm systems with the round’s flat-shooting long-range performance. San Tan Tactical builds the STT-15 6ARC around an 18-inch barrel and ships it with front and rear flip-up sights, finished in black. Among AR-platform rifles in the AR rifles category, the STT-15 6ARC favors shooters who want the modern 6mm ARC cartridge in a purpose-built AR-15.

Key Specifications

• Chambered in 6mm ARC, Hornady’s modern flat-shooting cartridge.
• Operates as a semi-automatic AR-15.
• Features an 18-inch barrel.
• Ships with front and rear flip-up sights.
• Feeds from a magazine with a 15-round capacity.
• Part of the STT-15 6ARC model line.
• Finished in black.
• Machined from a pillar billet 7075-T6 aluminum upper and lower for a matched, high-strength receiver set.
• The lower is fully ambidextrous with three QD sling attachment points.

Frequently Asked Questions

What cartridge does this rifle use? 6mm ARC, Hornady’s modern flat-shooting round.

What sights come with this rifle? Front and rear flip-up sights, usable as backups alongside an optic.

Buy the San Tan Tactical STT-15 6mm ARC

As soon as it’s ready to ship, the modern 6mm ARC cartridge in a purpose-built AR-15 is exactly what the STT-15 delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.