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UTG PRO AR Pistol Receiver Extension Tube Kit for AR-15 pistols in matte black. Includes receiver extension tube and related installation hardware. Original A description notes a precision machined matte black Type III Class II hard coat anodized 7075-T6 aluminum extension tube with a dry film lubricant interior, and includes Carbine Buffer, Buffer Spring, Castle Nut, and QD Receiver End Plate. Specifications (from A): Manufacturer UTG Pro; Color Matte Black; Finish Matte; Material Aircraft Grade Aluminum; Gun Make AR Platform; Condition New; Country of Origin USA.
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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