"The most basic ballistic firearm of the U-series the S1U is the probably the first ever firearm that came out of the producion line, and the first that a customer Learn to build in the U-Series training courses"
- Igor A. "Tank" Kutuzov

S1U
Type: Submachinegun

Barrel module: S - Compact Ballistic Handguard
Ammo/Cell: 1 - 4.7mm
Configuration: U - Standard stock config.
Sight: Standard dual sights (Separated)

Accessories: suppressor - laser/flashlight