To simulate a DMR (dedicated marksman rifle) used by a dedicated marksman. Privilege of a higher FPS is given to people willing to simulate that role, meaning a longer/heavier rifle, and the aforementioned lack of full auto. Usually, DMs will not "spam" the trigger, but behave like snipers, trying to make their shot count. The dedication they put to the role is rewarded with a small increase in FPS)
That doesn't mean that you can take any rifle and push it past 400 fps in semi only (you technically could but that would defeat the whole DMR thing). Also, unless you use a nicely tuned AEG, the extra 50 fps will not benefit you.
A last thing. Usually, people that act as DMs will, just like snipers, not engage if too close to the target. Not with their rifle at least.
K3vX | Airsoft Gunsmith/Gun doctor in training.
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