CMMG Zeroed Lower Parts Kit | Black | S5CA642

The CMMG Zeroed Lower Parts Kit (S5CA642) supplies the components required to complete an AR-Platform/Mk4 or AR-15 lower receiver build or repair. Parts include controls, springs, pins and installation hardware packaged in color-coded packets to simplify assembly. Components are made in the USA and are produced to meet or exceed mil-spec standards. Typical applications include gunsmithing, component-level repairs, and custom lower assembly.

Product Specifications

• The kit model is Zeroed Lower Parts Kit.
• The manufacturer is CMMG.
• The color/finish is Black Matte.
• Designed to fit AR-Platform/Mk4 and AR-15 lower receivers.
• Includes ZEROED Extended Bolt Catch, bolt catch plunger, spring, and roll pin; ZEROED Trigger Guard; trigger and trigger spring; disconnector and disconnector spring; hammer, hammer spring, and trigger/hammer retaining pins.
• Includes ZEROED 60/90 adjustable ambi safety with detent and spring, ZEROED ambi magazine catch with spring, and ZEROED extended magazine release button.
• Includes HD pivot and takedown pins with detents and springs.
• Includes ZEROED pistol grip, grip screw, and washer.
• Includes buffer retainer and spring.
• All installation hardware is included, and parts are packaged in color-coded packets.
• All parts are made in the USA.
• All components meet or exceed mil-spec.
• Package dimensions are 1.60 x 7.20 x 8.25 inches.
• No direct ship to California.
• The UPC is 810097502307.

This Zeroed Lower Parts Kit provides a comprehensive collection of mil-spec lower components and ambidextrous controls in an organized, color-coded format to streamline assembly and maintenance. Its full complement of parts — from extended controls to retaining hardware — supports efficient builds and repairs for armorers and informed builders who value reliable, factory-oriented components.