Suppression is THE premier use of infantry weapons. When the enemy is suppressed (hunkered down and not firing) then he makes an easy kill for flankers or for weapons that defeat defiliade. Suppression occurs when such a high volume of fire is thown at an individual and their survival instincts kick in which causes them to drop what they are doing and seek cover. Squad heavy weapons and SAW's are the most commonly used suppression weapons due to their high volumes of fire and heavy caliber. Other weapons such as grenades and explosives also cause a great amount of suppression. I find it easy just to add a save vs suppression save to the characters (which is basically the characters ME). Whenever somebody flings a burst at a character (or a whole bunch of rounds.....GM's discretion) just make the character make a save vs. suppression. If he/she fails then the character will lose all the remaining attacks that round or lose the initiative if its the end of a round. Burst capable weapons like the L-20 pulse rifle and the CP-40 make perfect assault weapons as the soldiers can expend multiple short bursts at a target while advancing to either neutralize a target or suppress it.