Shorter RPX form factor makes it perfect for pistol caliber carbines and 9mm handguns without sacrificing JKs signature suppression performance. Ships with a 1/2-28 piston / booster and high-flow flash hiding end cap installed optimized for reliable function on boosted 9mm platforms. Incorporates JKs most advanced rifle-pistol baffle geometry for excellent sound and pressure management across a wide range of cartridges. Built with a combination of quality materials and a modular baffle stack that lets you dial in the length and weight that best suits your firearm and mission. Excellent choice for 9mm pistols PCCs and lightweight rigs where a shorter overall suppressor profile is desired.