Primary Weapons Systems was formed by firearm enthusiasts in 2008. Starting out by producing muzzle devices, they tested their compensators on all different types of rifles - from M4s to AK-47s. After using both styles of rifles in testing with high round counts, the difference in maintenance needed was both astounding. From that basic realization, the PWS long-stroke piston system was born; keeping the core values of the AR-15 design, while also lessening the need for maintenance in high-volume fire situations and adverse conditions. The 13.5x1 LH piston allows the use of PWS suppressors on 13.5x1 LH threads.
- Prop65:
- CA PROP 65 WARNING: This product may contain chemicals known to the state of CA to cause cancer, birth defects or other reproductive harm.
- Fit:
- 13.5X1 LH
- Manufacturer #:
- Primary Weapons Systems
- Manufactuer Weight:
- PISTON-135X1LH
- Units Per Case:
- Piston
- Color:
- Suppressor Accessories
- Lens Color:
- Black
