Caliber: 5.7x28mm - Capacity: 10+1 - Grip Frame: High-Performance Glass-Filled Nylon - Barrel Length: 4.94 - Overall Length: 8.65 - Barrel Material: Alloy Steel - Barrel Finish: Black Nitride - Front Sight: Fiber Optic - Rear Sight: Adjustable - Slide Material: Alloy Steel - Slide Finish: Black Oxide - Weight: 24.5 oz. - Slide Width: 1.20 - Height: 5.60 - Grooves: 8 - Twist: 1:9 RH - This model ships with a 10-round magazine for consumers in those states which limit magazine capacity. - Impressive ergonomics include an easy trigger reach 1911-style ambidextrous manual safety robust slide release and reversible magazine release latch. - Through hardened billet steel slide with lightening cuts is drilled and tapped for easy mounting of optics with separately available optic adapter plate available at ShopRuger.com. - Windage and elevation adjustable serrated rear sight and rapid acquisition fiber optic front sight for fast accurate shooting. - The alloy steel barrel features a black nitride treatment for wear resistance. - Steel magazine provides double stack capacity without unnecessary bulk. - Textured ergonomic frame provides a secure and comfortable grip. - The Secure Action fire control combines Ruger's reliable and proven internal hammer with a short crisp trigger pull and a positive reset. - Safe easy takedown with no tools or trigger pull required. - Inspection port allows for visual confirmation of a loaded or empty chamber. - Picatinny-style accessory rail for easy mounting of lights and lasers. - Magazine drops free on release for convenient reloading. - Also includes: two steel magazines.