HK Army Performance Series Regulator Piston - Pressure:LP3 (250-300psi) Low-Pressure Performance: Operates efficiently at

Low-Pressure Performance: Operates efficiently at 180-220 psi for softer

Balanced Valve Design: This design reduces the force required to open the valve and also allows the valve to seal at very low pressure

Quick-acting stopping power

The First Strike T15 30 round V2 Magazine is the best in the game and is rated for Full Auto use out of the box without having to change springs

- Natural Comfortable Fit

HK Army Performance Series Regulator Piston - Pressure:LP3 (250-300psi) Low-Pressure Performance: Operates efficiently atUpgrade 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