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6 Positions MIL-SPEC Buffer Tube for M4

FAB Defense

  • 6 Positions MIL-SPEC Buffer Tube for M4
  • 6 Positions MIL-SPEC Buffer Tube for M4
  • 6 Positions MIL-SPEC Buffer Tube for M4
  • Item description
  • Weapon compatibility list
  • Manufacturer information
  • The Tube M4 is a machined MIL-SPEC Aluminum Receiver Extension Tube that accepts all M4-style MIL-SPEC adjustable carbine buttstocks and most commercials.


    • Six precision-machined notches on the underside provide plenty of options for setting length-of-pull.
    • Perfect for a custom build, installing a MIL-SPEC or commercial stock on a civilian carbine, or updating a fixed-stock rifle with an adjustable M4 stock.
    • Machined from a lightweight Aluminum extrusion, then hard coat anodized, and dry film lube-coated inside for smooth movement of the buffer and buffer spring.
    • Requires carbine recoil spring and buffer, lock ring, and receiver plate, all available separately.

    Suitable for:

    AR15 / M16 / M4


    • Material: Machined from a lightweight Aluminum extrusion, then hard coat anodized, and dry film lube-coated inside
    • Weight: 103 g
    • Hight: 37 mm
    • Length: 182 mm
    • Diameter: 29 mm

  • Please note! The offered accessory product fits according to our knowledge on the following weapon models.

    Please also note the exceptions in the item description under “Not suitable for”.

    This information is without guarantee. For further questions you can contact our expert team from Mo.-Fr. 9:00 – 17:00 under the following phone number +49 (0)2206 9519 440.

    AR15 / M16 / M4 Standard

    AR15 / M4 / M16 / AR10

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  • FAB Defense

    FAB Defense

    FAB-Defense® is a registered trademark of FAB Manufacturing & Import of Industrial Equipment Ltd. Fab Defense in Israel.
    FAB-Defense® is mostly common for their various accessories for all kinds of rifles and pistols. Since its inception, FAB-Defense® has been leading in development and manufacture of the highest quality, cutting-edge tactical equipment and weapon accessories for the State of Israel’s Military and Police.
    FAB-Defense® works worldwide together with Special Forces and SWAT teams to develop creative, ability enhancing and practical solutions for the Law Enforcement sector. Operational field trials are essential for the tactical accessory development and have a considerable influence on the production standards.

    Some of the best-known products are the KPOS-Scout, KPOS- G2, T-Pod G2 bipod, PTK and VTS grips as well as all the different rail systems, buttstocks and grips for rifles and shotguns.

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