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Brownells AR-15 pistol buffer tube assembly including a buffer tube, castle nut, end plate, buffer spring, and carbine buffer. The buffer tube is extruded from 6061-T6 aluminum with a matte black hardcoat anodized finish. Includes everything needed for seamless installation.
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$53.19
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$43.98
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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