It could be true. An AK with wooden furniture can put out quite a bit of smoke if overheated (there are even videos of them catching fire). I assume other wood stocked rifles will do same if a high enough rate of fire is maintained.
Lol this reminds me of the time we were in a live fire exercise. Night fire exercise, four squads, 2 SMAWs (one on each end), inside of them 2-M249 SAWS, inside of them 2 M16 w/M203 grenade launchers, the rest with M16s.
I was directing the fire and it was fire until you couldn’t fire anymore quite a light show. Up to the point I’m in the prone next to the SAW watching a PFC go at it and his barrel is glowing red. I smacked his Kevlar helmet so hard I know it rattled his brain screaming CEASE FIRE Marine!!!!
What I think is likely “fake” is:
1. 10 fully automatic weapons in the room
2. Fired over 700 shots.
But yes, it “could be true”. However, the media shouldn’t be reporting what “could be true”.