HK Army Performance Series Regulator Piston - Dye R2 4140 Steel Type III Hard

4140 Steel Type III Hard Anodized

and elastic molle storage system keeps your barrels (including one piece barrels

BARREL 6061-T6 Aluminum

HK Army HSTL Thermal Lens For HSTL Goggles and HSTL Skull Goggles

Designed for use with these models of markers/setups:

HK Army Performance Series Regulator Piston - Dye R2 4140 Steel Type III HardUpgrade your HK Army Performance Series Regulator with these pistons. These pistons come equipped with Belleville Shim Stack, designed for precision and ease of use. This innovative component allows you to adjust the output pressure of your regulator quickly and efficiently without needing to purchase an entirely new regulator unit. Simply pull out the entire shim stack unit and drop it into your regulator for seamless performance. The shim stack