UPDATE: March 27, 2018 - Quality Armory Guns Added
To use this addon, type:
/QA craft
In the Minecraft chat while on the server.
Note: "sulphur" mentioned in the crafting ingredients for ammo is actually "gunpowder" when putting the ammo together.
To reload the weapons, you must have ammo in your inventory and the gun must be in your hand. To reload the weapon with ammo, "right-click" with your mouse.