A shotgun, also called a "scattergun," is a firearm designed to shoot a multitude of lead or steel balls of varying sizes, greatly increasing the weapon's hit potential. This makes it very effective at hunting game. However, the accuracy and power found at close range starts to diminish as the target gets farther away. Shotguns designed for the military's use are often called "combat shotguns."
The Big Boomer is a sawed-off shotgun with the same break action, 12 gauge that fires both shells at a time, delivering 14 pellets at a time instead of the typical 7 of other shotguns.
Unlike the sawed-off shotgun, the Big Boomer has a much darker color scheme with heavier rusting, and the words "Big Boomer" stenciled onto the grip in faded white paint. It also excels when it comes to sheer damage, delivering 20 more points of total possible damage than its vanilla counterpart. In addition, Big Boomer also has a slightly tighter spread, lower AP cost, and fires slightly faster. The only major drawback is that the common sawed-off shotgun is classified as a holdout weapon, whereas the Big Boomer is not.
Within the games files exists an unused texture for the Big Boomer. It uses the Fallout 3 model and only differs from that in the color of the wood and the words Big Boomer written down the side of the handgrip.