Pablo,
Tell him to go get a Ruger American Rimfire. A Compact model # 8306 (threaded for a suppressor), 12.5" LOP, with a fixed 8x Leupold Scope, shot into 3/8" @ 50 yards across the hood of my tractor about a month ago, using CCI Standard Velocity 40 RN.
I think my LGS was asking $299.00 for the rifle.
The full size is Model # 8305 and has a 13.75" length of pull, more suitable for grown ups.
Adjustable trigger, uses 10/22 magazines, fiber-optic sights, and two buttstock options, one for iron sight use and the other is slightly raised for scope use.
Ed