Abstract: A firearm includes: a rail secured to the firearm; and an adjustable firearm stock secured to the rail, the adjustable firearm stock including: a base removably secured to the rail of the firearm and defining an extension element bore; and an extension element positioned in the extension element bore, the extension element configured to move along an axis of the extension element bore. A method of using a firearm includes: mounting a base of an adjustable firearm stock to a rail of the firearm; and sliding an extension element of the adjustable firearm stock through an extension element bore of the base to adjust the adjustable firearm stock to a desired orientation.