The Mossberg 640 KD is a vintage bolt-action .22 WMR from the early days of the cartridge, with a 24-inch barrel and walnut stock. A historically important rimfire as one of the first .22 WMR bolt rifles. Type: Rifle Action: Bolt-Action Caliber: .22 WMR Capacity: 5 Year introduced: 1960, USA Weight: 6.5 oz Overall length: 43.75" Status: Discontinued Intended use: Small Game,Varminting,Collecting