I don't know how many completions I've done Escalation Protocol I've done in the last couple of weeks but weapon drops seem to be non-existent now. I'm tried of completing this fairly lengthy event to get what, 3 or 4 shaders (of one of the worst colour schemes available) and to also be pr!@k teased by a armour loot chest you can't open unless you have done a ridiculous amount of heroic strikes (or some crap) and collected key fragments beforehand. I remember when I first completed Escalation Protocol ages back, in about 3 or 4 completions I got 2 shotguns but now nothing after probably 15 or more completions. What is the point of doing Escalation Protocol now if get nothing of value from it?
Sounds like you do waves 1 thru 7 everytime? Did you know you can just do wave 6 and 7 over and over? Guns only drop from wave 7, so doing waves 1 thru 5 is a waste of time. If you dont want the armor, dont open the chest. You dont need the chest to get a gun.