Engineering & Technical Division

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.






AEG Version Utility/Battle Rifle Stock for Western Arms M4/M16 Compatible Airsoft Gas Blow Back Rifle

Features:
- 7-Position LOP adjustable 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
- 0.3 inch removable Rubber Butt Pad
- Sling Mounts
- Front / Rear ambidextrous QD sling sockets
- Bottom 1.25" Sling loop

Length: 205mm (Retracted)

This will also fit the Tokyo Marui M4 Recoil Shock Series (modifications required)
You need to shave off the aesthetic threads and some of the threads on the buffer tube.
Sandpaper or dremmeling will work but we strongly recommend machining.






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