The Flak Cannon Mk2 is a monster. It Can fire 3 rounds before the Vanilla Flak has finished reloading. But the Trade off is that the ammunition feed cannot keep up and will become fouled if you fire it constantly.

> The flak Cannon feed will Jam after 6.0 Seconds of sustained fire.
> You must rest the gun for 1.5 seconds to reset this, giving the ammunition feed time to catch up. [the light stops flashing rapidly when this is complete]
> Because the rest time does not reset the countdown until complete, the point of no return is 4.5 Seconds

> You can Fix the jam by going to the forward ballast and force open the closed hatch with a crowbar.

> if you upgrade the weapon to something else, or your bloodline is too weak to handle the flak cannon's temper, you can disable the Jamming by swimming outside, and disconnecting the delay component that can be found at the underside of the flak cannon.