Showing 1–9 of 12 results

  • Upgrade your MVB MPK to a SBR (after receiving your stamp) or simply upgrade your 2 position or multi-position stock (purchased prior to December 2016) to the 2017 ARC-X stock model, which is dropped tested to 6 ft. and has an improved locking mechanism.  You can also upgrade to an ARC-Xti with titanium rails and skeletonized butt pad and base block.

    Kits includes complete stock assembly excluding buffer tubes, buffer, and springs.  The stock assembly consists of base block, rails, buttpad, and locking mechanism.

    ARC-X Upgrade Kit

  • Rear Buffer Tube.

    Replacement Rear Buffer Tube made of 7075 Aircraft Grade Aluminum or 17/4 ph Stainless Steel nitrided black.

    Product Weight:  1oz

    *Listed weight in the “Additional Information” tab includes packaging and is the shipping weight for freight charges.

    Rear Buffer Tube

  • Tungsten Weight

    Replacement weight

    Self-Install Solid Tungsten Weight to alter your existing buffer.

    Product Weight:  1.43oz

    Current stock status is:

    Tungsten Weight

  • For 1-1/4″ Slings.

    The release buttons on this swivel set come flush to the swivel body, virtually eliminating the chance for errant release of the swivel. Pull tested to over 300 pounds and featuring non-glare manganese phosphate finish.

    QD Sling Mount


    A 8 point wrench used to tighten the rear buffer tube of the ARC Stock. Standard 3/8″ torque wrench slot to ensure proper torque spec is achieved without damaging the buffer tube.

    Currently In Stock


    Buffer Tube Wrench

  • Replacement Spring Set

    Replacement Springs for the ARC 7.62/NATO Stock




    AR-10 Spring Set

  • Spring Connector.

    Spring connector for ARC Stock Springs




    Connector, Spring