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>I'm not sure why they keep going back and forth on this. I do know full auto is very inaccurate and
>is really only effective for suppression fire.

Not to stray too far from the topic, but the 3-round burst seems to be primarily an American peculiarity. Of the many other nations that issue M-16 type rifles, I believe most of the provide full-auto capabilty:

http://en.wikipedia.org/wiki/Colt_Canada_C7_rifle" onclick="window.open(this.href);return false;