The 20mm autocannons were the most eye-catching weapons that formed "long whips" with the tracer rounds.
Due to the higher pressure, the tracer rounds formed of Match Men stones grew in light intensity. Adding that the tracer rounds were more compact than ordinary bullets, there were almost no gaps in along the tracer rounds' flight trajectory.
Devilbeasts struck by the autocannons had no leeway to struggle; being penetrated by a blob of light meant taking multiple bullets. Even if the bullets strayed away from the main body and struck their wings, the power of the bullets tore large holes through them.
Of course, compared to shooting the wings, it was more common for the bullets to land on the swooping Devilbeasts' torsos. Following bursts of blood, a few rolled and plummeted, while the Mad Demons seated on them were only able to scream in anguish as they awaited their inevitable fates of colliding into the ground.