The Chiappa Firearms X -Caliber® is designed for use in any condition and with any ammunition available. Originally designed with two calibers, 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 original gauges, adapters allow you to shoot 8 pistol calibers ( .380 , 9 mm , .357Mag/.38SP , .40 S & W, .44 Mag, .45 ACP , .410/.45colt ) and two shotgun calibers (410 ga, 20ga), combining the flexibility of a shotgun and the power of a rifled gun.