Circle Square Firearms sells firearms, ammunition, and related products. You must be at least 18 years of age to enter.
Some products and transactions may require additional verification and a higher minimum age (21 for handguns under federal law).
Cmmg Inc.
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Prices and availability subject to change without notice. Product availability subject to applicable federal, state, and local laws.
Customization is endless with the AR15 platform which is why the CMMG ZEROED Mk4/AR15 Gunbuilder’s Kit includes all of the essential parts except the most commonly upgraded ones: Trigger Guard Fire Control Group and Pistol Grip. Check out our interactive install walkthrough video below or read the CMMG Resources LPK Install article for an in-depth breakdown. All parts meet or exceed mil-spec. All installation hardware included.
Kit Includes:
Cmmg Inc.
Cmmg Inc.
Cmmg Inc.
Cmmg Inc.
