On a side note, Why do half the characters in this game wear some sort of gas mask? This isn't l4d where it's some sort of infectious disease. These are clones we are killing. heh.
Well I can think of 5 with Gask masks Lewis, Davin, Powers, Foster, and Gary Glover. 7 if you count Wilkes and Lee Baron.
I'd reckon they are modelled after the SAS, mostly because the British SAS are most known in the media for their assault on the Iranian Embassy when 6 terrorists held 26 hostages captive. When a hostage was killed and thrown from the embassy they breached with an explosive charge on the skylight, cut the power to the building and threw stun grenades in to disorientate the terrorists. This obviously required wearing gasmasks.
Since this is the most famous image of them, most people stereotype the SAS to wearing gas masks (albeit incorrectly), and since they are the best of the British Special Forces that serve as a role model to armed forces all over the world, it would be hardly surprising if Killing Floors DRF Troops (Disaster Response Force) were modelled after them
