Mounts on a durable custom Receiver Extension tube (included) to accommodate carbine buffers and springs as well as aftermarket A5 buffer systems*
Solid “fixed stock” lockup and consistent cheek weld in all positions
7 adjustments plus fully collapsed for 8 total positions
Adjustment lever requires only gross motor movement to operate yet the entire stock remains streamlined and anti-snag
Enhanced lock mechanism with dual locking pawls for maximum drop strength and shock resistance
Multi-shell construction provides solid foundation and shields critical operating parts from penetration damage
Sloping cheek weld combines a slim profile with user comfort
Storage Compartment in tail of stock is removable and the door is reversible for user preference
Rubber butt-pad offers an anti-slip surface and increases impact protection
Rollover on the toe allows for easier shoulder transitions and better fit when using body armor
Front – QD swivel mount for ambidextrous one-point QD sling mounting
Left/Right Rear – Rotation-limited QD swivel sling mounts fit up to 1.5″ push-button swivels
Bottom – 1.25″ sling loop (additional loop accessible when Storage Compartment is removed)
*The UBR GEN2 includes the required custom Receiver Extension tube, Buffer Spacer, and all mounting hardware. A carbine buffer and spring (M4 or SR-25 length) or A5 buffer and spring are required for use with the UBR and are not included.
UBR GEN2 Collapsible Stock
Weight, w/Receiver Extension: 21.2 oz.
Length: 8.5-12.0 in.
Width, max: 1.7 in.
LOP Adjustment Range: 3.5 in.
LOP, M4 Collapsed: ~11.8 in.
LOP, M4 Extended: ~15.3 in.
**Specifications based on factory configuration