The Mil-Spec T6 stock assembly is built to exacting tolerances and allows for 6 adjustment positions. The TAPCO extension tube is not just made to Mil-Spec profile, all finishes and materials are as required by military specifications. A smooth action and snug fit of the stock body onto the tube can be attributed to new processes. Each stock body is machine qualified to the exact dimension of the tube, for a no-rattle fit. Each stock also features a metal sling swivel. All receiver extensions are not equal, and TAPCO's tube is second to none. The best Mil-Spec extension available today, our tube is impact extruded, producing a much stronger part. This is done using 7075 T6 Aluminum, the same material as most AR receivers. Each tube then has the threads rolled on, a Mil-Spec process superior to standard cutting of threads into metal. TAPCO didn't skip any steps on the finishing process either. The inside of the tube is coated with Mil-Spec dry film lubricant that not only keeps the action quieter; it reduces metal-on-metal contact, extending the service life of your buffer. While most other tubes are anodized or have no finish, the outside of the TAPCO tube is grit blasted to leave a non-reflective surface, then coated in Mil-Std 171 Lusterless Black for a smooth matte finish. Unlike many of our competitors, our tubes are 100% made and finished in the U.S. We'll even supply a certificate of origination; you won't find that anywhere else! - Dark Earth
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