Building a new AR-10 or AR-308 rifle? Perfect — one of the essential components you’ll need is a quality buffer tube assembly. Instead of sourcing parts separately and hoping they’ll work together, simplify your build with the Smith Defense AR-10/AR-308 Mil-Spec Buffer Tube Kit. This all-in-one kit includes everything required to mount any Mil-Spec compatible stock to your AR-10 or AR-308 lower receiver, ensuring proper fit, reliable function, and long-lasting durability.
Kit Includes:
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Mil-Spec 7075-T6 Aluminum 6-Position Carbine Receiver Extension Buffer Tube – Lightweight, strong, and built to military specifications for compatibility with most AR-10/AR-308 stocks.
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Buffer Assembly – 3.8 oz (H1) – Designed to deliver reliable cycling and consistent performance.
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Buffer Spring – Precision-wound for dependable operation and proper recoil impulse.
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Steel Castle Nut – Secures the buffer tube in place for a solid, long-lasting installation.
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Steel End Plate – Provides a secure attachment point and completes the assembly.
Whether you’re completing a brand-new build or upgrading an existing rifle, the Smith Defense AR-10/AR-308 Buffer Tube Kit offers an easy, all-in-one solution with premium components that are ready to install right out of the box.
