Boom Cannon
Grenade Launcher
Type Combo Weapon
Description 4-count grenade launcher made from the finest plumbing tubing and shotgun components available.
Awesomeness 10
Combine Grenade + Shotgun
Strength Great
Speed Fast
Location Los Perdidos Communication Tower
Fits in Inventory Yes

The Boom Cannon is a combo weapon in Dead Rising 3.

It can be created by combining a shotgun with a grenade.

The weapon blueprints are found in the Los Perdidos Communication Tower.

It acts similarly to the Grenade Launcher in terms of ammo and area of effect but it has a timer if it doesn't directly hit a zombie.