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AR-15 Build Kits & Assemblies - 5.7x28

Browse 5.7×28 AR-15 build kits and assemblies for compatible projects, with included components varying by product.

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CMMG AR-15 Barrel & BCG Kit – 8″ – 5.7x28mm – Radial Delayed Blowback
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$479.99
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CMMG AR-15 Barrel & BCG Kit – 5″ – 5.7x28mm – Radial Delayed Blowback
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$379.99
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