hes missing a xlr connection cap!!, as well as the I/O cover is off. no cables in there..so that must be where you load the bullets...or where those shells are flying out from!!
now you just need to spend some time in after effects creating a pan down from this shot to a bunch of xl1s and pd170s and 3000us ect with holes in them ...still smoking of course.. maybe a little pd150 on fire here..and an xl1 with tpe mechanism grease squirting out of its lense..bwahahahah!!