Magpul UBR Gen2 Adjustable Stock — Gray

The UBR Gen 2 from Magpul is an adjustable stock designed for AR-15/M4 and AR10/SR25 platforms that aims to provide the strength and stability of a fixed stock while allowing position adjustment. It incorporates a fixed cheek piece to maintain a consistent cheek weld through all eight positions and is compatible with Carbine, A5, and SR-25 length buffer systems. The design accepts larger bore AR calibers and is built to withstand impact while reducing weight compared to the original UBR. Standard features include front and rear QD sling attachment points, two footman’s loops, the MOE SL angled-toe rubber butt-pad and a customizable storage compartment. Made in U.S.A.

Key Specifications

• The length of pull adjusts from 11.80 to 15.30 inches.
• The construction uses Reinforced Polymer for durability and reduced weight.
• The stock offers 8 distinct adjustment positions for consistent cheek weld.
• A buffer tube is included for installation compatibility.
• The exterior finish is Gray (stealth gray).
• Designed to fit AR Rifles including AR-15/M4 and AR10/SR25 platforms.
• The adjustment method is Collapsible for compact storage and transport.
• Model designation is UBR Gen 2.
• Includes front and rear QD sling attachment points and two footman’s loops.
• The stock features a customizable storage compartment and the MOE SL angled-toe rubber butt-pad.

Purpose-built for users who want a stable, repeatable cheek weld and on-platform adjustability, the UBR Gen 2 blends fixed-stock rigidity with collapsible convenience. Its reinforced polymer construction, integrated sling options and storage, and compatibility with common AR buffer systems make it a practical upgrade for field, range, and precision setups where durability and consistent ergonomics matter.