It could have a more powerful spring. Often, the muzzle velocity of these cheap guns becomes it's most touted selling point to leave noobs going "OMFG!!! 400 fps out of the box! Even my friend's TM doesn't do that!". Notice how it's the first thing they seem to point out in the specs? Also, that could be with .12g BBs too. They don't specify the BB weight. And generally, the internals of these cheap AEGs (plastic bushings & pot metal gears) can't really handle the force of a 400 fps spring and they end up breaking very quickly.