DPMS .308 Claw This thing works great on the LR-308 The "Claw" is the perfect armorer tool for holding all DPMS .308 upper receivers. Made of a solid one piece high strength polymer, the Claw is extremely durable. Simply clamp the Claw into a bench vise, slide the upper onto the Claw, secure with the two holding pins and begin installing your barrel and components.