Burst-fire weapons

[SweptWasTaken]

Would be nice.

Also ties into improvements to guns like #1867

I want my G11

[metalgearsloth]

For reference for anyone looking at this it's already in but no guns actually use it as a default (main reason is no hotbar to change fire mode).

[SweptWasTaken]

Yes, i'll probably add a few myself, but they'll be stuck on burst-fire.