A firearm stock with a support such as a bipod, tripod, monopod, or aiming stick is described. The support includes support legs and a mounting structure which mounts the support legs onto the stock. The support legs may be detached from the mounting structure when the support is not in use. After removal from the mounting structure, the support legs may be stored in one or more channels in the stock, by sliding them through one or more apertures in the end of the butt of the stock. The mounting structure may include a swivel mechanism which allows the aiming of the rifle to be adjusted while the support legs remain engaged with the ground.