http://www.zdspb.com/media/video/viking_40cps.wmv kinda like thatAJermstad said:You can actually hit 17 with one finger if your gat is set up right (ie. probably a bit bouncy ) and you have a trigger with a couple of nubbins in it (ie. not flat and curved or straight).
Then you can rake your finger up and down vertically catching the nubbins with each sweep resulting a pretty high rate of fire.
But the pics your refering too...I'd guess it's full auto