Offering the same strength and stability as a fixed stock, Magpul’s UBR® Gen2 Collapsible Stock provides a reliable interface for your AR15 or M4 carbine rifle.

The UBR® Gen2 Stock mounts on a durable custom receiver extension tube (included) to accommodate the common M4 carbine buffer and spring, as well as aftermarket A5 buffer systems. The multi-shell construction provides a solid foundation and shields critical operating parts from penetration damage. The stock’s sloping cheek piece combines a slim profile with user comfort. The anti-slip rubber butt-pad increases impact protection, while the rollover on the toe allows for easier shoulder transitions and a better fit when using body armor. The enhanced lock mechanism with dual locking pawls ensures maximum drop strength and shock resistance. Requiring only gross motor movement to operate, the UBR’s adjustment lever keeps the entire stock streamlined and anti-snag. The UBR Stock features multiple sling mounts: a QD swivel mount on the front for ambidextrous one-point QD sling mounting; rotation-limited QD swivel sling mounts on the rear for up to 1.5” push-button swivels; and a 1.25” sling loop on the bottom. With its durable construction, enhanced ergonomics,(more...)