SDT(TM) - Self Defense Trigger for Optimal Consistent Pull First Round to Last Dovetailed White Dot Sights Standard Picatinny-Style Rail Ergonomic Textured Grip Textured Finger Locator Aggressive Front and Back Strap Texturing Distinctive Two-Tone Finish Front and Rear Serrations Model: SW SD9 VE Caliber: 9mm Capacity: 16+1 Action: Striker Fired Action Barrel Length: 4" / 10.2 cm Front Sight: White Dot Rear Sight: Fixed 2-Dot Overall Length: 7.2" / 18.3 cm Width: 1.29" / 3.3 cm Weight: 22.7 oz. / 643 g Grip: Textured Polymer Frame Material: Polymer Slide Material: Stainless Steel Barrel Material: Stainless Steel Finish: Two-Tone