The Magpul PTS UBR (Utility / Battle Rifle), U.S. Patent 6651371, is a fully-featured, adjustable butt stock for AEG M4 / M16. 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. 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.

Features

- New design Receiver Extension tube which fits Lipo Battery.
- It fit short type AEG receiver only.
- 7-Position LOP adjustability with customizable preset system for fast access to preferred length
- Made by DuPont Polymer with Reinforced Stock Body (Steel plate)
- Solid fixed stock lockup in all positions
- Repositionable cheek piece accommodates users requiring extra eye-relief
- Stout construction provides counterbalance weight for improved weapon balance and handling
- Sling Mounts
- Front / Rear - push-button QD sling mounts
- Bottom - 1.25" Sling loop

Included Accessories*

- Storage Module (Left-Right Reversible / Removable)
- Rubber Butt-Pad, 0.30" (Removable)
- Front / Rear dual side push-button QD sling mounts