Tsunami

 (aka Heavy Shotgun) is a Tier 5 Tank that upgrades from Shotgun at level 60.

Design
The resembles the Shotgun but it is slightly larger. Its main barrel is a bit longer and both its main barrel and base are slightly wider as well.

Technical
The fires more projectiles, some of which are larger. The largest of its projectiles look to be about Pounder size and do about Pounder damage. It has very low reload though.

As the

 * Invest in reload if you want to survive. Without a decent amount of reload you will not be able to fire often enough to defend yourself.
 * With even modest stats, this tank can nearly one-shot an EK-1 at point-blank.

Against the

 * Exploit the tank's low reload by making it miss a shot and going in for the kill.
 * As with normal shotguns, do not approach it. It is extremely lethal at close-range.

Trivia

 * This tank was known as the Heavy Shotgun in Oxyrex.