The UMS offers a smaller footprint and bottom curve which makes for a far superior anchor of the stock on the chest. This allows an operator to get in and out of postion with greater of ease. Utilizing two heavy duty set screws, the UMS offers easy installation on receiver extension tubes.
- (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.There will be empty space between the stock and tube with most cylindrical tubes.