Like someone said to me, ''400fps is a limit, not a goal!''
Some guns will reach farther distance at 340 fps than if it was upgraded to 400fps. There is so many variables in the airsoft. For us the limit is set to 400fps down here with sometimes a little tolerance of 10 fps cause upgrading is not an exact science. Sniperswith BA are limited to 500fps but they are not allowed to shoot if the target within 75-100 feets. Snipers AEG broked in semi (SR25, or PSG1, ect...) are limited to 450fps with the same rule. Also we suggest to avoid headshot. Freeze is not option if both players aiming theyre guns at each other, it's clean fight but if a player surprise another then he could freeze.