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The CMMG 55CA65A AR Pistol Receiver Extension Kit AR Style Carbine is a versatile kit designed to be used with your chosen lower parts kit to complete a pistol lower group. It includes a CMMG pistol receiver extension, a carbine buffer assembly, and a carbine action spring, providing all essential components in one convenient set.
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$53.99
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Sign In to Set AlertThis is a bundled product that includes multiple components. The exact contents may vary - check the product description for more details.
• Complete assembly ready to use
• Multiple components included
• Value package pricing
Guide
A comprehensive overview of every major component in an AR-15 build—including what's inside bolt carrier groups and parts kits—organized by assembly for new builders.
12 min read
Guide
A neutral overview of AR-15 buffer systems, covering carbine vs. rifle receiver extensions, buffer weights, springs, and how these parts affect cycling and recoil.
5 min read