PWS 13.5X1LH PISTON BLK

Primary Weapons Systems Piston, Fits 13.5x1LH, Anodized Finish, Black PISTON-135X1LH

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