UBR™ Collapsible Buttstock
The Magpul® UBR™ (Utility / Battle Rifle), U.S. Patent 6651371, is a fully-featured, adjustable butt stock for the AR15 / M16, M4 Carbine, or AR10. Unlike typical collapsing stocks, this modular design offers the stability of a fixed stock with consistent cheek weld in any position. Seven-position length-of-pull (LOP) adjustment is quickly executed with gross motor movement while the integral preset system allows direct access to a preferred position. A robust lock mechanism and multi-shell construction increase durability under severe impact conditions experienced during malfunction clearing and accommodates large-bore AR calibers. The UBR™ also provides extra counterbalance weight to improve handling on full-length rifles and weapons with muzzle-heavy accessories or grenade launchers. Optional components such as dual-side sling mounts and metal strike plate allow the UBR™ to adapt to the mission at hand.
Note: The UBR™ includes the necessary Entry Receiver Extension tube and all mounting hardware. An M4 Carbine Buffer and Spring are required for use with the UBR™ and are not included unless added.
OPTIONAL UPGRADE: Add Carbine Milspec Buffer and Quiet Chrome Spring
Made in USA
Ø Mounts on durable Entry Receiver Extension tube (Included)
Ø 7-Position LOP adjustability with customizable preset system for fast access to preferred length
Ø Multi-shell construction provides solid foundation and shields critical operating parts from penetration damage
Ø Solid “fixed stock” lockup in all positions
Ø Enhanced lock mechanism w/ impact buffer increases drop strength and shock reduction
Ø Repositionable cheek piece accommodates users requiring extra eye-relief
Ø Stout construction provides counterbalance weight for improved weapon balance and handling
Ø Sling Mounts
o Front / Rear - Single-side push-button QD sling mounts (Left-Right Reversible)
o Bottom - 1.25" Sling loop
Ø Storage Module (Left-Right Reversible / Removable)
Ø Rubber Butt-Pad, 0.30” (Removable)
Ø Extended Rubber Butt-Pad, 0.55”
Ø Aluminum Strike Plate w/ 1.25" sling loop
Ø Dual-side push-button QD Sling Mount Sockets
Ø AR10 / SR25 Buffer and Spring (For Armalite AR10 and KAC SR-25 type rifles)
Ø UBR™ Stock (w/ Rubber Butt-Pad, 0.30”)
o Weight, w/ Entry Receiver Extension: 1.56 lb.
o Length, Stock: 8.00-11.30 in.
o LOP Adjustment: 7-Position (0.56 in. / position)
o LOP Adjustment Range: 3.3 in.
o LOP, Collapsed (M4/M16): 10.9 in.
o LOP, Extended (M4/M16): 14.2 in.
* Removing Standard Rubber Butt-Pad subtracts 0.30 in. LOP and 0.09 lb. Optional Extended Rubber Butt-Pad, 0.55” adds 0.25 in. LOP and 0.02 lb. vs. standard pad. Butt-pads are compatible with UBR™, ACS™, CTR™ and MOE™ carbine stocks.
** Specifications based on factory configuration
This item or some of its components cannot be exported from the United States of America without a valid export permit from the U.S. State Dept. Unfortunately, this also includes APO addresses due to ITAR restrictions.