SPECIFICATIONS: Caliber: MULTI Model: BCM4 Stock: BCM Mod 2 SOPMOD Fire Control: PNT Semi Auto Rear Sling Mounts: QTY 3 Receiver Extension: 7075 T6 Mil-Spec Diameter Buffer Type: Carbine H Pistol Grip: BCM Mod 4 Trigger Guard: BCM Enhanced BCM Included Upgrades: BCM PNT(TM) Trigger (Polished Nickel Teflon) BCM QD Sling Mount End Plate BCM Pistol Grip Mod 4 BCM Stock Mod 2 SOPMOD BCM Enhanced Trigger Guard BCM Lower Receiver Groups Also Feature: Receivers Machined from Aluminum Forgings 7075-T6 Receivers Hardcoat Anodized per MIL-A-8625F, Type III, Class 2 Staked M4 Lo Mfg: Bravo Company