HK Army MP5 Regulator Piston 450-550psi
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Delivery and Shipping
Most orders ship within 24 hours. Free shipping available on orders over $59 to the continental United States. (Alaska, hawaii, and Puerto Rico not included) (Paintballs and certain rounds not included)
HK Army MP5 Regulator Piston 450-550psi
HK Army MP5 Regulator Piston 450-550psi
Features:
Precision Pressure Control for Your HK Army Regulator
The HK Army Performance Series MP5 Mid Pressure Piston is engineered for paintball players who need reliable, repeatable output pressure without the cost of a full regulator replacement. Whether you're tuning a new build or restoring a regulator that's no longer holding consistent pressure, this piston shim stack is the cleanest solution on the market.
The core of this upgrade is the Belleville Shim Stack — a proven disc-spring system widely used in precision engineering for its ability to generate significant, consistent force within an extremely compact space. Compared to conventional coil-spring pistons, the Belleville design offers a more streamlined profile and more predictable spring force, translating directly into steadier output pressure shot after shot.
Installation is straightforward: simply remove the existing piston stack from your Performance Series regulator and drop in the MP5 unit. The shim stack wraps around a solid brass piston that arrives pre-fitted with all required O-rings — no hunting for extra hardware, no guesswork. The result is a leak-free fit and consistent mid-pressure output (450–550 PSI) from the very first shot.
This piston is one of the most cost-effective upgrades available for the HK Army Performance Series platform — far cheaper than purchasing a new regulator just to change your pressure setting.
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