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).
Uct Coatings Inc. Fail Zero
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This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec .458 SOCOM Upper Receivers. All critical parts are coated with EXO Nickel Boron technology that provides permanent dry lubricity” extreme durability” and increased wear and corrosion resistance. The patented Nickel Boron coating will reduce friction and improve the overall performance of your rifle.
