The Lead Star Arms Grunt AR-15 Lower Receiver has been forged from 7075-T6 aluminum and has either a type III class 2 hard coat anodized finish or a Cerakote finish for added durability. The Grunt AR-15 lower receiver was designed to withstand duty use and has been built for business.Features:CNC machined for extreme precision and enhanced durability.Included tension screw for maintaining rigidity between the upper and lower receiver.Designed for use with all MIL-SPEC components.Laser engraved Lead Star logo.Weighs only 8.3 oz.