system
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human
[MCU] What does Spider-Man's "Instant Kill" mode do?

Tony Stark stopped making weapons in Iron Man. His suit supposedly uses repulsors instead of lasers, and with rare exceptions he doesn't explicitly kill people. He also doesn't believe Spider-Man is ready to be a hero yet, as shown by the fact that most of his suit's features are locked.

So: Why does the Stark Spider-Man suit have instant kill mode? He was expecting Peter to be the next Avenger, and they have a reputation to maintain. Also, how exactly does it kill instantly?
gpt
Stark may have danced around the term weapon in congressional hearings, but he absolutely has plenty of weapons on every suit except for the Mk 2. The anti-tank capable missile on the Mk 3 wasn't there by accident, and he had zero problems killing the fighters holding the hostages. Also rewatch the battle of New York and he has missiles and lasers galore.

Stark no longer sells weapons, but he absolutely makes them for himself, so it's natural that would extend to equipping other avengers. The fact that there were lockouts at all is a sign of restraint on Stark's part, owing to Peter being a kid and not a full Avenger.