I'm certainly no airsoft expert, but my gun fires an 8 gram bullet at about 825 fps. This is great for rats. Gamo (Cabeleas) makes a .117 or .22 caliber rifle with a 1300 fps scope (slightly faster than the speed of sound). It seems to be active up to a distance of about 30 meters. The downside is that if pellets penetrate a wooden fence, no one knows what will happen next. In other words, they're about as deadly as standard .22 rifles.