Guild Wars 2

How does the Backpack regenerator works, how much does it regen and does it work with all kits including flamethrower and elixir gun?

all kits, but not increased by your + healing stat.
Even med kit counts as a kit.

125 per second, and never changes unless you swap to your normal weapons (gun or pistol)

125 Health per tick. It stacks with Regen boon and Super Elixir. There is no visual aid to tell that it is working besides watching your HP go up. Doesnt scale with Heal power either.

I wonder if it stacks with HP regen food. If so that would be awesome.

Zero Angel.9715:

I wonder if it stacks with HP regen food. If so that would be awesome.

i believe it does in that case the question would be does food regen stacks with normal regen boon .

It does stack. But Regen food heals for like 70, right?