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!