Sure. Have one. Outters I think, but I'm not going to go out in the shed and look.
Used to use it a lot up north, down here in Texas it's just too easy to go out the back door and down to the pond. If you do use one indoors, remember that there are the same three rules to follow as after eating boiled cabbage - ventalation, ventalation, ventalation.
Try Cabelas or other similar suppliers. Often grouped with air gun supplies (but suitable for .22 RF).