|A lot of speculation assumes that what the various films featuring Predators use, must be firing plasma bolts. However, upon reading here, taht seems quite unlikely.
Judging by the characteristics, what could it be? It's a bolt of some sort, with a bright glow. It apears to super-heat the target, upon impact, sealing the wound and leaving "no powder burns". It's a bit slower than a bullet.
Could it be possible that the glowing projectile is actually a tracer created out of heat? Something hot enough for the thermal vision of the mask to track, with the actual thing doing the damage being invisible? If so, then it would have to be moving at the same speed.
What could it potentially be?