New for 2016, the SW22 features: Removable Interchangeable Match Barrel, Steel Reinforced Polymer Thumb Safety, Picatinny-Style Rail Included, Fiber Optic Front Sight, Adjustable Fiber Optic Rear Sight, (2) Ten-Round Magazines Included, Adjustable Trigger Stop, Stainless Steel Frame, Textured Grip Panels with Finger Cuts for Easy Magazine Removal. This item features a 1/2 - 28 threaded barrel, a steel reinforced polymer thumb safety, picatinny-style rail, fiber optic front sight, 2 ten round magazines, and a stainless steel frame.