The SOLGW Scalper Complete Lower Receiver is a premium mil-spec lower forged from 7075-T6 aluminum and finished with durable black anodizing. This model features the Scalper roll mark and selector markings. The M16-cut lower includes a low rear shelf and is fully machined to remove forging flash.Features :7075-T6 Aluminum ConstructionM16-Cut Lower ShelfMulti-CalBlack Anodized FinishComplete Lower Receiver