Barrel: machined from bar stock with 7 lands and grooves having a 161 right hand twist. Receiver: 7075T6 aircraft grade heat treated aluminum alloy, machined from bar stock. Grip/Frame: Made from Zytel polymer, with ergonomic finger grooves and an integral "RE-COIL CUSHION" on the backstrap. Recoil Spring System: all steel, fully encapsulated for ease of disassembly and reassembly. Slide Lock/Release: steel with a Zytel over molded polymer extension for ease of operation. 3 dot sight system: steel rear sight, adjustable for windage only with locking screw. Hammer firing system: double action only, internal hammer with inertial firing pin to prevent accidental discharge if dropped. Manual Guarded Safety: CPX1 only. Newly designed with a guard molded into the frame. CPX-2 has NO manual safety. Double action trigger: specifically designed for shooter comfort and accuracy by designing the system to have a smooth effortless, consistent 9 pound trigger pull. Magazine: included with (2) double stack, 10 round capacity magazines with finger extension base installed and 2 flat magazine bases included. Trigger Guard Lock: custom designed to properly fit and be child resistant. Includes 2 keys.