The Vantage Point Armory Rail-Mounted Compensator for Beretta PX4 Storm Full is engineered for 9mm .40 S&W and .45 ACP pistols. Designed to mount securely on the full accessory rail without affecting the pistols cycling this 7075 aluminum compensator reduces recoil enhances stability and maintains reliable operation without the need for a threaded barrel. It easily detaches for cleaning and fits most holsters designed for frame-mounted accessories. Compatible with: Beretta PX4 Storm Full / 9mm & .40 Cal Compact Tactical Beretta PX4 Storm Full / .45 ACP Compact Tactical Beretta PX4 Storm Compact / 9mm & .40 Cal Compact Personal Defense. Includes: Lock Bar (x1) Set Screws (x2)