The Excel Arms MR-22 is the .22 LR variant of the MR-Series, using a blowback action appropriate for the rimfire cartridge. Accepts Excel Arms proprietary .22 LR magazines. Same lightweight polymer stock as the MR-9. An affordable plinking and training carbine. Type: Rifle Action: Semi-Automatic Caliber: 22 LR Capacity: 25 Year introduced: 2006, USA Weight: 54 oz Overall length: 34" Status: Active Intended use: Plinking, Training, Range