PISTOL: RUGER MODEL SR22, SERIAL NUMBER 361-63436, SEMI - AUTOMATIC, 22 LONG RIFLE (22LR), STAINLESS, CASE NOT INCLUDED, 3.5" Notes: Ruger SR22 22lr does not come with magazine. * Caliber: .22 LR * Action: Double-Action/Single-Action (DA/SA) with external hammer and straight blowback * Weight: 17.5 oz (approx. 496 g) * Dimensions: 6.40 in overall length, 3.5 in standard barrel length (4.0 in and 4.5 in options also exist), 4.90 in height, 1.29 in width * Frame & Slide: Lightweight polymer frame with a Picatinny accessory rail and a serrated black anodized aluminum slide