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Precision machined from 7075 aluminum, Aero Precision's mil-spec AR-15 carbine buffer tube kit with Heavy H2 Buffer. Ensures proper fitment of adjustable mil-spec sliding stocks. Includes H2 heavy buffer; designed to slow the movement of the BCG under recoil. Carbine buffer weight: 3 oz; H2 buffer weight: 4.7 oz. Mil-Spec 7075 aluminum.
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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.
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