CMMG ZEROED Mk3/AR-10/LR-308 Enhanced Lower Parts Kit Black. Every piece is made here in the USA and comes in convenient color-coded packets to make assembly a breeze. Check out our interactive install walkthrough video below. Don't forget a Buttstock or Brace kit to complete your pistol or rifle lower. All parts meet or exceed mil-spec. All installation hardware included. Not all .308 lowers are the same. Our kit is designed to work with our lowers (Gen 1 DPMS High-Pattern LR-308) and meet or exceed mil-spec. We would recommend checking with the manufacturer of your lower for compatibility of parts if you are not using our receiver. Kit Includes: ZEROED Drop-In Trigger ZEROED Pistol Grip Five color-coded packets containing the following parts: Red Packet ZEROED Anti-Walk Hammer/Trigger Pins & Screws Yellow Packet ZEROED Mk3 Bolt Catch Bolt Catch Plunger Bolt Catch Spring Bolt Catch Screw Buffer Retainer Buffer Retainer Spring Blue Packet ZEROED Ambi Mag Catch ZEROED Extended Mag Release Mag Catch Spring Green Packet ZEROED 60/90 Ambi Safety Selector Detent Selector Spring Pistol Grip Screw White Packet HD Pivot & Takedown Pins Pivot/Takedown Detents Pivot/Takedown Springs Specifications for CMMG ZEROED Mk3/AR-10/LR-308 Enhanced Lower Parts Kit: Manufacturer: CMMG Color: Black Gun Make: CMMG AR Platform DPMS Gun Model: CMMG Mk3 DPMS LR-308 AR-10 Gun Type: Rifle Package Contents: CMMG ZEROED Mk3/AR-10/LR-308 Enhanced Lower Parts Kit CMMG 38CA619: ZEROED Mk3/AR-10/LR-308 Enhanced Lower Parts Kit Black