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Magpul UBR Gen2 AR15/AR10 Collapsible Rifle Stock
Magpul UBR Gen2 AR15/AR10 Collapsible Rifle Stock

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List Price: $199.95
Price: $199.95
SALE: $169.95
Savings: $30.00

Stock Status:(Out of Stock)




Magpul UBR Gen2 AR15/AR10 Collapsible Rifle Stock


The Magpul UBR GEN2 is an adjustable stock for AR15/M4 and AR10/SR25 platforms, designed to offer similar strength and stability as a fixed stock with a consistent and comfortable cheek weld in any position.

An update of the revolutionary Utility/Battle Rifle (UBR) stock, the UBR GEN2 features a fixed cheek piece to provide a consistent cheek weld in any of its eight positions, and is compatible with Carbine as well as A5 and SR-25 length buffer systems. Designed to accommodate large bore AR calibers and withstand severe impacts, the UBR GEN2 is nearly five ounces lighter while retaining all the durability its predecessor was legendary for. Comes standard with front and rear QD sling attachment points, two footman’s loops, the ergonomic MOE SL™ angled-toe rubber butt-pad, and customizable storage compartment.

Made in U.S.A.


  • 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
  • Sling Mounts:
  • 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)


  • 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.

NOTE: 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.

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 5 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 Sturdy June 11, 2020
Reviewer: Norman Castello from Jefferson , LA United States  
Looks beautiful

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  0 of 0 people found the following review helpful:
5 of 5 Magpul Stock May 11, 2020
Reviewer: Anthony Hall from Daytona Beach, FL United States  
Fast shipping, product fit perfectly. I love it, and I saved a bunch of money!

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  0 of 0 people found the following review helpful:
5 of 5 UBR gen 2 stock September 16, 2019
Reviewer: Richard Morris from Clovis, NM United States  
Have used this stock on several ARs and love it. Arms unlimited also had the best price. Have them now on my favorites for parts.

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  0 of 0 people found the following review helpful:
5 of 5 magpul UBR February 15, 2019
Reviewer: Rennie Steen from Virginia Beach , VA United States  
this is an awesome stock and fits and functions great , keeping your cheek in a constant position , Arms Unlimited took great care of me and i received the order super quick ,

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  0 of 0 people found the following review helpful:
4 of 5 Gen2 UBR April 30, 2018
Reviewer: Philip C from Lewisville , TX United States  
While not as robust as the original, it is much lighter.  But if you're going to carry the weapon, it's better way to go. The instructions could be more clear in stating that it IS an A5 buffer tube length,  which is  a medium length buffer tube, shorter than a full lenght stock, but longer than a carbine stock.   So if you're running A1 full length  buffer tube and spring, do NOT use the spacer.  If you're running a carbine length buffer tube and spring,  USE the spacer.

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