Phase 5 Universal Mini Stock (UMS)

Phase 5

  • The Phase 5 Universal Mini Stock (UMS) is a fixed stock solution for your rifle that fits on a variety of buffer tubes and receiver extensions. Proudly made in the USA from USA sourced raw billet 6061-T6 aluminum. - Lighter than most polymer adjustable stocks at (5.7 oz.) -  and it’s easy to install.


    • UMS Stock
    • (2) Set screws
    • (1) Extended hex key


    • Mil-Spec 6-position carbine receiver extensions
    • Phase 5™ HexOne Buffer Tube
    • Phase 5™ Hex-2 Buffer Tube
    • Most cylindrical buffer tubes, 1.10”-1.25” OD*
    • Rifle length receiver extension tube*

      The set screw will be more secure on the cylindrical buffer tubes if you put a small dimple on the tube.*
  • Manufacturer Part Number: UMS
    Dimensions: 5 x 1-3/4 x 2-1/4 inches
    Weight: 5.7 oz.
    Material: 6061-T6 Aluminum
    Finish: Black MIL-A-8625 Type III Class 2 hard coat anodizing

    No Additional Information Provided
  • The MSR Arms Advisor articles are intended to answer some of the most common shooter questions and assist our customers in making the best purchasing decision possible.
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