Had a Mini once, I figure Bill Ruger, god rest his soul still owes me for it too. The one gun in my life that lost value from the minute I bought it til the day I begged someone to buy it from me.
If you are just looking for something that will burn up .223 ammo fast and without fail ....go for it. If you plan on actually shooting at some thing and hitting it consistently, a slingshot is a betterr option.