In the mission, when you need to poke boxes in the port of 6th guards, you can fill up quickly and painlessly:
pull out the bit (only not weapon!!!) and calmly lumes on the repairs of guards, just do it from behind everyone and do not hook by Kdar near the standing guard. What we have from this: a couple of charged Thompsons, Colt 1911 and something else. With the successful murder of these 6th, you can safely continue to twist the boxes – no one touches you! Just do not affect the open before the other protection with the colts and other weapons – will be lit by the moment!