Sons of Liberty Gun Works SCALPER, Complete Lower Receiver, Semi-automatic, Anodized Finish, Black, B5 Furniture, Liberty Fighting Trigger, Blaster Internals, Vltor A5 Buffer System, Quick Safety SCALPERLWR-A5Q SOLGW M4 Milspec Complete Lower. Collaboration with Rogue American Apparel featuring the Scalper logo and selector markings. Forged from 7075-T6 Aluminum. M16 pocket cutout. Fully machined to remove flash markings from forging.