The available calibers (though not every rifle is designed for each of the calibers) are the following: .17 Remington, .17 Hornet, .22 Hornet, .204 Ruger, .221 Fireball, .222 Remington, .223 Remington, 6.5mm Grendel, .300 AAC Blackout and 7.62×39mm.
The available rifle cartridges (though not every firearm is designed for each caliber) include: .17 Remington, .17 Hornet, .22 Hornet, .204 Ruger, .221 Fireball, .222 Remington, .223 Remington, 6.5mm Grendel, .300 AAC Blackout and 7.62×39mm.