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Primary Weapons Systems Piston Up to 14% Off w/ Free Shipping — 2 models

Primary Weapons Systems Piston, Fits 1/2X28, Anodized Finish, Black, PISTON-1-2X28
Primary Weapons Systems Piston, Fits 13.5x1LH, Anodized Finish, Black, PISTON-135X1LH
Primary Weapons Systems Piston, Fits 1/2X28, Anodized Finish, Black, PISTON-1-2X28
Primary Weapons Systems Piston, M13.5x1 LH, Black, PISTON-135X1LH
Primary Weapons Systems Piston, Fits 1/2X28, Anodized Finish, Black, PISTON-1-2X28
Primary Weapons Systems Piston, Fits 1/2X28, Anodized Finish, Black, PISTON-1-2X28
1 of 5 images
Primary Weapons Systems Piston, Fits 1/2X28, Anodized Finish, Black, PISTON-1-2X28
Primary Weapons Systems Piston, Fits 13.5x1LH, Anodized Finish, Black, PISTON-135X1LH
2 of 5 images
Primary Weapons Systems Piston, Fits 13.5x1LH, Anodized Finish, Black, PISTON-135X1LH
Primary Weapons Systems Piston, Fits 1/2X28, Anodized Finish, Black, PISTON-1-2X28
3 of 5 images
Primary Weapons Systems Piston, Fits 1/2X28, Anodized Finish, Black, PISTON-1-2X28
Primary Weapons Systems Piston, M13.5x1 LH, Black, PISTON-135X1LH
4 of 5 images
Primary Weapons Systems Piston, M13.5x1 LH, Black, PISTON-135X1LH
Primary Weapons Systems Piston, Fits 1/2X28, Anodized Finish, Black, PISTON-1-2X28
5 of 5 images
Primary Weapons Systems Piston, Fits 1/2X28, Anodized Finish, Black, PISTON-1-2X28

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Product Info for Primary Weapons Systems Piston

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.image

WARNING: California`s Proposition 65

Specifications for Primary Weapons Systems Piston:

Manufacturer: Primary Weapons Systems
Color: Black
Finish: Anodized

Features of Primary Weapons Systems Piston, Fits 1/2X28, Anodized Finish, Black:

  • 1/2x28

Package Contents:

  • Primary Weapons Systems Piston

Primary Weapons Systems Piston Orderable Models

List of Orderable Models

  • Primary Weapons Systems Piston, Fits 1/2X28, Anodized Finish, Black, PISTON-1-2X28 , MPN: PISTON-1-2X28 , UPC: 811154033789 , Code: 2D5-MD1-PWSP28-PISTON-1-2X28
  • Primary Weapons Systems Piston, M13.5x1 LH, Black, PISTON-135X1LH , MPN: PISTON-135X1LH , UPC: 811154033772 , Code: 2D5-MD1-PWSP28-PISTON-135X1LH
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Last updated 2026-06-28 UTC.