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    The Best Mil-Spec Extension Tube on the Market - Perfect for Any Collapsible Mil-spec Diameter Stock

    All receiver extensions are not equal, and the INTRAFUSE tube is second to none. The best Mil-Spec extension available today, the tube is impact extruded, producing a much stronger part. This 6 position tube is perfect for any collapsible mil-spec diameter stock. 
    This is done using 7075 T6 Aluminum, the same material as most AR receivers. INTRAFUSE 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 INTRAFUSE tube is grit blasted to leave a non-reflective surface, then coated in Mil-Std 171 Lusterless Black for a smooth matte finish.

    Specs and Features

    • 6061 aircraft aluminum
    • Black Matte Exterior Coat
    • Mil-Spec size

    Includes

    Buffer Tube
    Castle Nut
    End Plate Sling Adapter
    Recoil Buffer
    Recoil Spring

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