The Dead Air Mojave Piston PB440 is a 1/2x28 threaded 9mm piston for Dead Air Mojave suppressors used on tilting-barrel handguns. This piston is designed for use with the Dead Air Mojave 9 and Mojave 45 when paired with the proper booster assembly and internal booster spring.

On most modern semi-automatic pistols, the barrel must unlock and tilt during the firing cycle. A proper piston and booster assembly allow the pistol to cycle reliably with the added weight of a suppressor attached. Dead Air lists the Mojave piston as part of the PB500 Booster Assembly system for use on tilting-barrel handguns.

1/2x28 9mm Piston: The PB440 model is the 1/2x28 version for compatible 9mm threaded pistol barrels. Always confirm your host firearm’s barrel thread pitch before ordering or installing a suppressor piston.

For Mojave 9 and Mojave 45 Suppressors: This piston is intended for Dead Air Mojave suppressors and should not be confused with Dead Air P-Series pistons used for other suppressor families such as the Primal, Wolfman, or Ghost.

Tilting-Barrel Handgun Use: The Mojave piston is designed for use on tilting-barrel handguns. For fixed-barrel hosts, use the correct Dead Air fixed-barrel spacer or fixed mounting solution recommended for your suppressor and firearm setup.

Important Fitment Note: This PB440 model has 1/2x28 threads and is intended for compatible 9mm threaded barrels. Always verify thread pitch, bore alignment, suppressor compatibility, and host firearm configuration before live fire.

Related Gear: Browse more muzzle devices, shop additional silencer accessories and suppressor mounts, or pair your compatible host with 9mm Ammo.