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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Or contact Circle Square Firearms directly at (866) 303-7222 or [email protected].
Prices and availability subject to change without notice. Product availability subject to applicable federal, state, and local laws.
Expertly crafted from aircraft grade aluminum CMMG® Mk4/AR15 upper receiver assemblies come with our ZEROED® Polymer Dust Cover pre-installed. This upper receiver omits the forward assist for those looking for a sleek and stylish base to start a new AR15 build.
