I can't find it anymore, the entire fucking site is filled with halloween costumes of video game characters because reddit is the only group of people who would actually give a fuck.
I think the thread was originally about how mirrors in vidya games work or something, and it somehow devolved into that. Then there was someone coming in that said a ranger told them to put the five tracer rounds last so you know if you were out, other people arguing with him that said BUT THEN THE ENEMY WILL KNOW YOU'RE OUT OF AMMO, another person saying it was a waste of tracers, etc. it was pretty obvious none of them were ever in the military because they would have known the policy differs between battalions and even platoons.
There was also someone in there correcting everyone's terminology of the word gun, and that it's either a rifle or pistol and you only refer to a machine gun as a gun. PRetty obvious fresh basic training grad who probably fucking refers to velcro as hook and loop