I've seen them. Look kind of like the real thing. Doubt it would be any good for a practice gun. I'd go with at least a m&p 22. I don't think the slide blows back on that bb gun. Some do but I don't think that one. I could be wrong. Also don't know what the trigger is like on those. At least with the .22 model you'd get the trigger feel, the fs frame size, better feel for recoil (less but closer), probably better service for it, etc. Also, idk if you can change out the sites on the bb model. Are you not of age to buy a bigger one?