Magpul Instructions - UCS Universal Carbine Stock

Published on May 15, 2025
Duration: 3:34

This guide details the installation and adjustment of the Magpul UCS Universal Carbine Stock. It covers mounting to the M1913 interface, setting length of pull, installing reversible cheek risers, reversing the QD sling mount, adjusting stock height in full and half-slot increments, and reversing the folding mechanism. Specific torque values and tool requirements are provided for each step.

Quick Summary

The Magpul UCS Universal Carbine Stock mounts to the M1913 interface and is secured by a 5/32 hex wrench, torqued to 65 in-lbs. It offers 3 inches of length of pull adjustment across six positions and features reversible cheek risers and QD sling mounts.

Chapters

  1. 00:10Mounting the UCS Stock
  2. 00:25Adjusting Length of Pull
  3. 00:36Installing Cheek Risers
  4. 00:53Reversing QD Sling Mount
  5. 01:09Adjusting Stock Height
  6. 01:25Fine Height Adjustment (Half Slot)
  7. 02:03Reversing Folding Mechanism
  8. 02:50Hinge Assembly Reversal

Frequently Asked Questions

How do you install the Magpul UCS Universal Carbine Stock?

To install the Magpul UCS, mount it onto the firearm's M1913 interface. Use a 5/32 hex wrench to tighten the mounting clamp screw and torque it to 65 in-lbs. Ensure the firearm is unloaded before beginning.

What are the torque specifications for the Magpul UCS stock?

The mounting clamp screw for the Magpul UCS should be torqued to 65 in-lbs. For reversing the QD sling mount, the screw is torqued to 15 in-lbs. The hinge assembly mounting screw also requires a torque of 65 in-lbs.

How can I adjust the length of pull on the Magpul UCS stock?

To adjust the length of pull, simply depress the dedicated length of pull buttons on the Magpul UCS and extend or collapse the stock. The UCS provides 3 inches of adjustment across six distinct positions for a customized fit.

Can the Magpul UCS stock be adjusted for height?

Yes, the Magpul UCS stock can be adjusted for height. Loosen the mounting clamp screw and move the stock up or down in one-slot increments. For finer, half-slot adjustments, you can rotate the mounting clamps and screw 180°.

More Tactical & Gear Videos You Might Like

More from Magpul

View all →