I use a nice mp 289 its a tec 9 replica you can get it for $10 shoots 310 fps. The clip need slight modification with scotch tape and your good to go with 22 round clip.
i have shot a lot of .25-.300 100 yd groups with a 14x, and a ton of pd out to 500+ unless you are to compete 14x is all you need to 200-300 for targets.