Air Systems & Parts

Silver fill nipple which is used for both the 3000psi and 4500psi air tanks.Warning!  Always make sure to turn off the air calve before releasing t...

HK Army replacement 4500psi compressed air tank regulator piston for Standard and Aerolite tanks - Brass DOES NOT INCLUDE PIN HARDWARE 

Upgrade your HK Army Performance Series Regulator with the MP5 (Mid Pressure 500psi). Piston. These pistons come equipped with Belleville Shim Stac...

HK Army replacement 3000psi compressed air tank regulator piston for Standard and Aerolite tanks - Brass DOES NOT INCLUDE PIN HARDWARE 

HK Army Aerolite Low Pressure Piston/Shim Assembly 250-400psi Output This is only compatible for HK Army Aerolite 4500psi Regulators