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The CMMG 55CA9A7 buffer assembly is a stainless steel buffer designed for AR-15 platforms with fixed, non-collapsing stocks that use a rifle-length receiver extension. It is intended as a direct replacement for AR-15 A2 style stocks and provides reliable operation with a durable construction. Replacement buffer for AR-15 buffer tube assemblies.
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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
Guide
A neutral guide to component strategies for left-handed shooters, left-eye dominant right-handed shooters, and those managing eye/hand dominance mismatches. Covers ambi uppers, charging handles, gas system tuning, and real-world tradeoffs.
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