CMMG Gunbuilder's Lower Parts Kit for MK3 Approved

Contains the necessary parts to complete an AR15 lower receiver besides the receiver extension and butt stock. Building on the mil-spec standard, CMMG Gunbuilder’s Kits include everything you need in a new or custom lower build where you add the trigger, pistol grip and trigger guard of your choosing. Basic parts list: takedown pin, safety selector, bolt catch, receiver pivot pin, selector detent, bolt catch plunger, takedown pin detent (2), magazine catch, bolt catch spring, takedown pin detent spring (2), magazine catch spring, bolt catch screw, hammer and trigger pin (2), magazine release button, buffer retainer and buffer retainer spring.