Ranged weapons/guns

Ranged Weapons are used by pretty much every Humanoid, whether it’s Player mercenaries, Player Antagonists, NPC allies, or NPC enemies. If they have a gun, they need to put ammo in it.

Ballistic Guns
Ballistic Guns shoot bullets. Most of these use magazines.

Magazine-Fed
Magazine-Fed guns are Guns that use magazines, duh. The difference between a ballistic gun and laser gun is whether it uses bullets or batteries. .

Pistols
Pistols are small guns that can be used efficiently with one hand. Most of the time they are used as a sidearm and lacking in damage. They compensate by being lightweight and small, making them able to fit in belts/bags/webbing/pouches. You should be able to dual-wield them without many problems.

SMGs
SMGs are weapons using pistol calibers, while still having features of rifles, such as being able to wield it with both hands, they can be used as a heavier sidearm or as a main weapon for lighter loadouts or support loadouts, 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, it is a very large category, these are what you'll probably use the most, and what you'll find a lot of ammo for. Make sure to take the right gun for the right mission, though. An assault rifle is likely the most versatile weapon you can use, but you're not going to fight in close quarters with a sniper! or... are you?

Shotguns (Magazine-fed)
While most Shotguns will use tubes that you have to load each shell into individually, some Shotguns use magazines. These are almost always semi-automatic, and reloading is quick, though you can store a lot more shells in a bandolier than you can hold magazines in a belt, so be mindful about how long you’ll be in combat.

Statics
Static Weapons have to be deployed before they can be used. These are VERY slow to use in comparison to man-portable weapons, but can serve a very useful purpose if placed correctly. A turret can defend an injured mercenary while they heal, for example.

Shotguns (Pump-Action)
Pump Action Shotguns are a very useful class of weapons, due to the fact that they do not require magazines, can devastate enemies at close range, and can be loaded with many different ammo types at once. They are, however, slower to fire than most guns, and you cannot fire them with one hand unless you want to break your wrist.

Revolvers
While most revolvers are one-handed, there’s a few rare revolver-rifles. Revolvers typically hit harder than pistols, and can be loaded with single bullets, but they have more recoil and low ammo capacity, aswell as slow reloads if not using a speed loader.