San Tan Tactical®, Hornady Mfg® and Proof Research® have partnered up on the San Tan new 6ARC rifles. San Tan’s innovative high quality firearm systems and unparalleled performance in combination with Hornady’s New 6ARC round originally developed for a specialized group within the US DoD, and Proof Research premium carbon fiber barrels take the AR15 platform to a whole new level! The San Tan Tactical STT-15-6ARC rifles are a superb example of industry leading technologies from companies pushing the envelope with a desire to achieve more! With the other wildcat caliber’s coming to market over the recent years, the recent 6.8 military requirement, all in an attempt to pursue the maximum output from the AR15 platform.

The Hornady 6 ARC cartridge combined with their variety of projectiles currently available allows a significantly increase in capability above and beyond what is currently available in the AR15 platform. The capability to weight savings is seen in out STT-15-6ARC-Lite, the slick sided billet matched receiver set with out signature lightening pillar cuts. Removing as much weight as possible without sacrificing strength and performance.

STT true matched pillar billet sets, hand finished, matching serial numbers. The upper is cut from a single solid 7075T6 Certified Aerospace Aluminum. Propriety special burnished bore that gives a compacted internal surface, resulting in a much smoother surface finish. The bore, receiver extension face, barrel nut threads and barrel extension surfaces are all machined in one operation ensuring that they are perfectly concentric and perpendicular to the barrel assembly.

Features

• STT Suppressor Optimized Enhanced Bolt carrier group
• STT 6 ARC HPT MPI Bolt, Crane O-ring Upgrade
• Proof Research 18” Carbon Fiber 6ARC Barrel
• CMC Triggers 3.5lb Single Stage Match Trigger
• MagPul MOE plus Grip
• MagPul CTR Stock
• MagPul MBUS Pro
• STT 15 16” MLOK Rail
• Precision CNC machined from billet 7075-T6 certified aluminum
• Propriety special burnished bore that gives a compacted internal surface, resulting in a much smoother surface finish
• Type 3, class 2, deep black, hardcoat anodized black
• Features extended feed ramps
• Ambidextrous Mag and Bolt release controls (ambi version only not Lite)