Magpul UBR Gen 2 Adjustable Stock – AR-15/M4 (FDE)

The Magpul UBR Gen 2 (Utility/Battle Rifle) is a precision-adjustable stock designed for shooters who demand rigid lockup and consistent cheek weld on AR-15 and M4 platforms. Unlike traditional collapsible stocks, the UBR Gen 2 uses a dual-side clamping mechanism that eliminates wobble and provides a rock-solid shoulder interface for improved accuracy and recoil management. The extended cheek weld and increased drop at heel promote proper head positioning for both iron sights and optics.

Constructed from reinforced polymer with a Flat Dark Earth finish, the UBR Gen 2 features seven positions of adjustment and a lockable storage compartment in the base. Installation requires a Mil-Spec carbine buffer tube. The stock accepts AR-15/M16 carbine action springs and includes an integral QD sling mount on each side. No gunsmithing required—installs with standard tools.

• Type: Adjustable buttstock
• Compatible Firearms: AR-15, M4 (Mil-Spec carbine buffer tube)
• Material: Reinforced polymer
• Finish: Flat Dark Earth (FDE)
• Adjustable: Yes (7 positions)
• Installation: User-installable, requires Mil-Spec carbine buffer tube