Mike, no Sir. Any 22 Combo firearm always come with 2 barrels for rifles or 2 cylinders with revolvers as 22 Magnum cases are both longer and larger in diameter than 22LR cases. A 22 Mag would not chamber in a 22LR chamber and a 22LR would be too loose and wiggle around in a 22 Mag chamber.

No. The 22 WMR is larger than the 22lr, which is why it comes with 2 barrels. You’d have to swap the barrel in order to shoot one round over the other, which is cool. Normally, you would have to buy two of the same rifles just to have different calibers. But with this you get just an extra barrel. You can also shoot 17 HMR with that particular barrel for that round. It was my pleasure to assist you.