High Durability: Waterproof fabric designed to withstand wind

impact-resistant polyurethane body resists bending and flexing

lasting fingerprints

About 20 percent larger than the Native

Wheeler Engineering Delta Series AR 15 Receiver Lapping Tool 156757 Fingerprinting High Durability: Waterproof fabric designedWheeler Engineering Delta Series AR 15 Receiver Lapping Tool 156757 Lapping a receiver ensures a perfectly square and true surface for the barrel to mate against, thus enhancing accuracy. AR 15 Upper receiver barrel alignment is critical to accuracy. Also, honing the surface can produce optimal positioning of barrel nut so ideal torque can be achieved along with proper gas tube hole alignment.