Primary Weapons Systems Piston M13.5x1mm LH, Black

Primary Weapons Systems Piston Fits 13.5x1LH Anodized Finish Black. 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. Specifications for Primary Weapons Systems Piston Fits 13.5x1LH Anodized Finish Black: Manufacturer: Primary Weapons Systems Color: Black Finish: Black Threads per Inch: M13.5x1 LH Additional Features: Piston Handle Color: Black Features of Primary Weapons Systems Piston Fits 13.5x1LH Anodized Finish Black: 13.5x1 LH Package Contents: Primary Weapons Systems Piston Fits 13.5x1LH Anodized Finish Black