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, and sling mount capability, Magpul’s UBR® Gen2 Collapsible Stock is a solid addition to your AR15 or M4 carbine rifle.

Features:

• Stock mounts on a durable custom receiver extension tube (included) in order to accommodate the common M4 carbine buffer and spring, as well as aftermarket A5 buffer systems*
• Multi-shell construction provides a solid foundation and shields critical operating parts from penetration damage
• Sloping cheek piece combines a slim profile with user comfort
• LOP provides a consistent cheek weld in any of its eight adjustable positions
• Storage compartment in the tail is removable and features a reversible door for user preference
• Anti-slip rubber butt-pad increases impact protection
• Rollover on the toe allows for easier shoulder transitions and a better fit when using body armor
• Enhanced lock mechanism with dual locking pawls ensures maximum drop strength and shock resistance
• Adjustment lever requires only gross motor movement to operate and keeps the entire stock streamlined and anti-snag
• Stock features multiple sling mounts:
  • On the front: a QD swivel mount for ambidextrous one-point QD sling mounting
  • In the rear, on both the left and right sides: rotation-limited QD swivel sling mounts that fit up to 1.5” push-button swivels
  • On the bottom: a 1.25” sling loop (an additional loop is accessible when the storage compartment is removed)
• ITAR: International Traffic in Arms Regulations Controlled Product

* The UBR GEN2 includes the required custom Receiver Extension tube, Buffer Spacer, and all mounting hardware. A carbine buffer and spring (M4 or SR25 length) or A5 buffer and spring are required for use with the UBR and are not included.

Specifications:

• Weight, w/Receiver Extension: 21.3 oz.
• Length: 8.5-12.5 in.
• Width, max: 1.7 in.
• LOP Adjustment Range: 4.0 in.
• LOP, M4 Collapsed: ~11.6 in.
• LOP, M4 Extended: ~15.6 in.

* Specifications are based on factory configuration.

WARNING: Observe safe firearm handling practices at all times. Failure to do so may result in serious bodily injury or death. Magpul Industries shall not be responsible for injury, death, or property damage resulting from faulty installation, misuse, illegal use, or modification of this product.

EXPORT NOTICE: This is an item controlled for export by the International Traffic in Arms Regulations (ITAR). These controls take the form of export regulations and license requirements. As part of the express consideration provided for receipt of Magpul's goods, technical data and/or services, you, our customer, acknowledge that the export, re-export or other transfer, directly or indirectly, of the goods, technical data and/or services provided by Magpul in violation of U.S. law is prohibited. Customers acquiring ITAR goods, technical data and/or services from Magpul shall be responsible for obtaining any necessary U.S. or other government authorization required to ensure compliance with applicable export laws. (See Magpul Shipping and Returns FAQ for more information).