Suppressive Fire

[Blah]

Another example of a firefight in Afghan: http://www.youtube.com/watch?v=MBd8Fl6gGdI
Although it's from MSNBC, so take it with a grain of salt.

Then we have the fallacy of the weight of the ammo. (5.56 = 4.01 gm, 7.62 = 9.7 gm) So one Nato 7.62 weighs the equivalent of 2.4 5.56 rounds. So the theory is that you can carry 2.4 times the number of 5.56 rounds as opposed to 7.62 NATO. Now the perceived benefit of that is clearly lost if the M4 is used on automatic fire, yes?

My sources indicate that M885 weighs 12.31 grams, and M80 weighs 25.4 grams. So just a smidge more than 2* the weight.