Specifications and Features: Caliber: 9mm Luger. Barrel: 3.27 . Magazine Capacity: 10 rounds. Length: 6.1 . Rail: Picatinny accessory rail. Sights: Fixed 3 dot. Frame: Polymer. Action: DA/SA . Grip: Textured . Finish: Bruniton. Weight 27.4oz. The Beretta PX4 Compact Semi Auto Pistol is an ideal carry gun for just about anyone. It features a lightweight polymer frame ambidextrous safety interchangeable back straps and a stainless steel barrel which all lead the PX4 to ideal carry gun status. The integral Picatinny accessory rail is ideal for mounting a laser. Its modular construction allows you to interchange back straps to perfectly fit your hand and shooting style while the slide lock and safety are ambidextrous; in addition the magazine release is reversible meaning that you can easily train with and use your PX4 with either hand.