The M-K II trigger was the first 2 stage AR15 trigger!  Now offered by Precision Rifle Components!

The PRC-700SA Chassis was purpose-built for the precision rifle competitor. From its modular weight kit to its adjustable thumbrest, The PRC-700SA was designed from the ground up to provide a stable shooting position off barricades, bags, tripods, and the various other unique shooting positions. Learn more by clicking Buy Product.