I have a friend that asked me to help him find a pellet pistol for eliminating these pests from his yard. He says they create terrible messes on their patio, sidewalks and other areas. He wants a pellet pistol for his wife. He has a break barrel RWS rifle but she cannot cock it. He is away on his job for weeks at a time. She wants a pistol, however I do not think she can cock a break barrel. My question is, will a CO2 pistol with 450 FPS velocity have enough energy to do the job. I do not know if he has an air compressor. Would a standard air compressor have enough pressure to charge a PCP? Any info and recommendations would be appreciated.