M45F Close Assault Weapon System

The M90D Close Assault Weapon System (abbreviated M90D CAWS), more commonly known as the M90 Shotgun, is the United Nations Space Command's resident shotgun during the Necros War.

Introduction
The M90D Shotgun packs extreme stopping power at close ranges, and will kill almost any enemy in at close ranges. It is often wielded in urban conditions, where the close ranges are conducive to the shotgun's mode of operation. The shotgun also makes a perfect defensive weapon to fend off enemy boarding parties inside starships. The weapon's power lies in the great stopping power of a cloud of buckshot, which, while extremely powerful in close-quarter combat, is useless at long ranges. However, it should be noted that the shotgun user can engage enemies at medium ranges as well.

New Features
The newest model, the M90AD, is used in the Necros War. It has slightly changed from all of the models, especially in appearance, with the green iron sights reintroduced, a slightly longer barrel and the flashlight is mounted on the side. In addition to that, it also has an 8 shell-magazine, but makes up for it in terms of range and a slightly higher rate of fire.

A major new feature on the M90D CAWS is the introduction of the Misriah Rail onto the receiver and the forward grip. This allows the user of the shotgun to customize it with a wide variety of weapon add-ons to increase its efficiency in combat.