That link I pasted above does seem credible KDF chatter. Sample this:
"On every floor, the buggers had placed multiple 50Cal Machines guns placements every floor sighted with incredible military profeciency - remember these Malls have a fire-stairwell on either side of them. Kevlar Body Armour, such as the Recce and SOCOM wear, stops a 7.62mm but gives a kick that could knock a fella unconscious. A 5.56mm is not a challenge on Kevlar even if Full-jacketed. Now, a 50Cal will cut through Kevlar like a hot knife through butter, whether full-jacketed or not. That is what the Recce boys faced as they ended their sweeps on Second day - and CDF called in the SOCOM. Against Standard Infantry Assaault Ordnance, the Recce boys could easily have dealt with these bastards kitambo."