The X-Caliber Rifle is designed for use in any condition and with any ammunition available. Designed with two barrels, a rifled .22 LR and a smooth bore .12 GA , this rifle can fire up to 12 different calibers thanks to the 8 steel adapters supplied. In addition to the two barrel calibers, the adapters allow you to shoot 8 additional pistol calibers ( .380, 9 mm, .357Mag/.38SP, .40 S&W, .44 Mag, .45 ACP, .410/.45colt ) and two shotgun calibers (410 ga, 20ga). This is the perfect lightweight pack gun to have on hand for any survival situation. Features picatinny rails, fiber optic front sight & adjustable rear sight, and a polypropylene foam stock with storage space.