Magazine: Includes (2) double stack 10 round capacity magazines with finger extension base installed and 2 additional flat magazine bases. Barrel: Machined from bar stock with 7 lands and grooves having a 1:16 right-hand twist. Receiver: 7075?T6 aircraft grade heat treated aluminum alloy machined from bar stock. Slide: Quality Stainless Steel available with Natural Stainless or Black Nitride finish. Grip/Frame: Made from Zytel polymer with ergonomic finger grooves and an integral “RE-COIL CUSHION” on the back?strap. 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. Double-Action trigger: Specifically designed for shooter comfort and accuracy by designing the system to have a smooth effortless consistent 9-pound trigger pull. Trigger Guard Lock: Custom designed to properly fit and be child resistant. Includes 2 keys.