Magpul UBR Gen 2 Adjustable AR-15/M4 Stock OD Green

The Magpul UBR Gen 2 is an adjustable rifle stock engineered for AR-15/M4 and compatible A5 and SR-25 buffer-length platforms. It pairs the stability of a fixed stock with the flexibility of a collapsible design, offering a consistent cheek weld across its range. Constructed from reinforced polymer and produced in the U.S.A., the Gen 2 retains the durability and user-focused features of the original UBR while reducing overall weight. Standard features include front and rear QD sling points, footman loops, an ergonomic MOE SL butt-pad, and a customizable storage compartment.

Key Specifications

• Tube included is Yes.
• Provides a consistent cheek weld across 8 positions.
• Constructed from reinforced polymer for durability and reduced weight.
• Length of pull adjusts from 11.80″-15.30″ to suit shooter preference.
• Designed to fit AR-15 platforms and compatible buffer systems.
• Finish is OD Green (Olive Drab Green).
• Adjustment type is collapsible for quick length changes.
• Includes front and rear QD sling attachment points and two footman’s loops.
• Features the ergonomic MOE SL angled-toe rubber butt-pad and customizable storage compartment.
• Made in the U.S.A..

The UBR Gen 2 balances stability and adaptability for shooters who demand a reliable stock without excess weight. Its fixed cheek piece and multi-position adjustment support consistent sight alignment and ergonomic setup across different shooting positions and gear configurations. Whether configuring a patrol-style carbine or updating a precision-oriented build, this stock delivers practical features and proven construction in a compact, user-focused package.