CMMG S5CA642 Zeroed Lower Parts Kit Black Grip, Ambi Safety & Mag Catch, Mil-Spec Trigger, Fits AR-Platform/Mk4

Kit Includes: ZEROED Extended Bolt Catch AR15Bolt Catch Plunger, Spring, & Roll Pin, ZEROED Trigger Guard, Screw, & Roll PIn, Trigger & Trigger Spring, Disconnector & Disconnector Spring, Hammer & Hammer Spring, Trigger/Hammer Retaining Pins, ZEROED 60/90 Adjustable Ambi Safety, Detent, & Spring, ZEROED Ambi Magazine Catch & Spring, ZEROED Extended Magazine Release Button, HD Pivot/Takedown Pins, Detents, & Springs, ZEROED Pistol Grip, Grip Screw, & Washer, Buffer Retainer & Spring. Finish your next AR15 lower receiver with the CMMG ZEROED Mk4/AR15 lower parts kit. 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 or read the CMMG Resources LPK Install article for an in-depth breakdown. Dont forget a Buttstock or Brace kit to complete your pistol or rifle lower. All parts meet or exceed mil-spec. All installation hardware included.

When you shop with Cummings Family Firearms, you’re buying from a trusted firearms dealer committed to competitive pricing, knowledgeable customer service, and a hassle-free shopping experience.

• Competitive pricing on firearms, ammunition, optics, and accessories.
• Earn rewards on qualifying purchases.
• Exclusive firearm bundles and special offers.
• Safe and secure checkout with trusted payment processing.
• Fast shipping to your preferred FFL dealer where applicable.
• Fully compliant with all federal, state, and local firearm laws.

Whether you’re purchasing CMMG S5CA642 Zeroed Lower Parts Kit Black Grip, Ambi Safety & Mag Catch, Mil-Spec Trigger, Fits AR-Platform/Mk4 by CMMG or shopping for your next firearm, our team is here to provide expert service before and after the sale.