Looks like fun but I never really understood the 22-only rifles that look like an AR15. If you want something that looks like an AR, why not get a real AR with a conversion kit, that way it's useful for AR stuff (home def, hunting, etc) and you can put in the conversion kit to go plinking an shoot for cheap with 22s. If you want something that's good at shooting 22s, why not get a good 22 like a 10/22.
My 22 kit came with 3x "30 round" (holds about 26) magazine. It *used to* be a good, cheap way to spend an afternoon behind my AR.