Spike's Tactical stripped lower is made to the highest standards. Forged from 7075 T6 aluminum, it supports multi-calibers, black hard coat anodized finish, is low shelf, and RDIAS compatible. This model has a Calico Jack logo. NOTE: Requires a lower parts kit, buffer & stock of your choosing to complete. Specifications and Features:Type: StrippedGun Model: AR-15Gun Type: AR PlatformCaliber: Multi-CaliberMaterial: 7075 AluminumFinish: Black Hardcoat AnodizedTrigger: None