Wow, I haven't see references to the M16 in awhile. I was deployed to Bagram in the summer of 2002 and was issued a no-frills M4 which was very similar to what was used in training. I don't know the proper answer to the various tracer-round questions being asked here, but I do own a few boxes of (XM856) 5.56 x 45 64-grain tracer rounds. I purchased these as a civilian about 5-years-ago from one of the big online gun stores (I think it was Primary Arms).Quote:
Recalling my Army days, I believe tracer rounds were only used in larger caliber weapons like the 20mm...I think. At least, I never fired one out of my M-16.
It was made for many calibers, even handgun. And I've never been impressed by the Mythbusters' weapon knowledge.