The Marlin Model XT is a series of rimfire bolt-action rifles produced by Marlin Firearms, first saw production in 2011. The rifle comes in several different models in both the .17 (XT-17s) and .22 calibers (XT-22s), with either a detachable box magazine or a fixed tubular magazine, and with various stocks and finishes. It has Marlin's patented Micro-Groove riflings, and the Pro-Fire® Adjustable trigger, which is similar to the Savage .