DEAD AIR ARMAMENT PISTON FOR MOJAVE .40 CALIBER SUPPRESOR The Dead Air PB442 and PB443 pistons are precision-machined components designed for use with the Mojave 9 and Mojave 45 suppressors on tilting-barrel handguns. Engineered to ensure reliable cycling and optimal performance, the PB442 features a 9/16-24 thread pitch, while the PB443 offers M14.5x1LH threading, both tailored for .40 caliber applications. These pistons are part of the PB500 Booster Assembly system, working in tandem with internal booster springs to maintain smooth operation regardless of suppressor weight or host firearm configuration. Built for durability and compatibility, they provide shooters with de Mfg: Dead Air Armament