I've always preferred the M-16 because I could shoot better with it, it has a better field of view and it's fast. Since the WW came out, I'll have to admit I usually opt for that as I seem to shoot as well or better with it and it has the advantage of being a harder target than the M-16.
About the only time I use the M-16 now is if I have to get somewhere fast.
A few weeks ago I went to a v- base because it was flashing. From the tower I could see what appeared to be troops heading for the map room. I figured the base capture was pretty much a done deal as the troops were within 100 yards of the map room.
In desperation, I grabbed an M-16, raced out there and actually managed to get there in time to kill all the troops. Got the added bonus, as I swung around, to see the c47 sitting there on the ground maybe a couple hundred yards from me and blasted it.
Couldn't of made it there in time with any of the other anti- aircraft guns.