Ranged weapons/guns

Ranged Weapons are used by pretty much every Humanoid, let it be Players, Nanotrasen guards, Antagonists but also Enemies, virtually all ranged weapons will require some sort of ammo.

Ballistic Guns
Ballistic Guns are Guns that use bullets these have an Large variety of Feeding-Systems and Calibers.

Magazine-Fed
Magazine-Fed guns are Guns that need to have a Separate Magazine attached to it to continuously be able to fire, like Assault Rifles or Pistols.

Pistols
Pistols are handheld guns that are usually not wieldable with 2 hands, most of the time used as sidearms and lacking in damage, they compensate by being lightweight and small, making them able to be put in pockets, they should be able to be dual-wielded without having a penalty to accuracy.

SMGs
SMGs are weapons using pistol calibers, but having features of long guns, such as a way to wield it with both hands, they can be used as a sidearm or as a main weapon for lighter classes or support roles, such as a dedicated medic or engineer.

Rifles
Rifles take a lot of forms, from assault rifles in 5.56 to anti-material snipers chambered in 12.7 they are very versatiles, this is what you'll probably use the most, and what you'll find a lot of ammo for, just make sure to take the right gun for the right mission! you're not going to fight in close quarters with a sniper! or... are you?

Shotguns
While most Shotguns will use tubes that you have to load each shell individually, some Shotguns use separate magazines to have an increased ammo capacity while decreasing the time needed to reload, however more space is being taken because the mags take up space.

Statics
Static Weapons are Weapons that have to be deployed and will then be able to fire from this position, and they aren't movable unless you deconstruct them, they are good for guarding places.

Pump Action
Pump Action Shotguns are a versatile class of Weapons, due to the fact you can quickly reload bullets individually it makes it suited for quick but frequent engagments, most devastative at close range.

Revolvers
While most Revolvers are Handguns, they can also be Rifles as well, the handheld revolvers typically have less ammo and a slower firerate compared to pistols but they deal a lot more damage to the target.