Innovative design enables the shooter to quickly remove the functional mechanism and place it into the polymer grip of his choice. Allows an immediate change in caliber and size;(subcompact, compact and full). Steel frame, interchangeable polymer grips. Ambidextrous slide catch lever. Reversible magazine catch. Black Nitron slide finish. Siglite Night Sights. Double action only. Accessory rail. One magazine. Note: Caliber X-Change kit sold separately.