Make your weapon your weapon
Attachments are used to customize your weapons. They can improve and alter many different parts of the weapon, from its rate of fire or hipfire accuracy to handling speeds or even headshot damage on some weapons.
Each attachment (including sights) require one of your Pick 10 points, so be very choosy about what attachments you take. A ‘nice to have’ attachment may not outweigh another perk choice, or a key piece of equipment.
New to Call of Duty: Black Ops III is the ability to create a primary weapon with five attachments. Doing so burns up all of your Pick 10 points, requiring you to take the Primary Gunfighter perk three times. But if you really want a tricked out weapon, you can make one.
Normally, each gun can take one optical sight, two attachments for primaries, and one for secondaries. The Primary and Secondary Gunfighter wildcards let you add an extra attachment past the normal limit.
In Call of Duty: Black Ops III, Attachments actually customize the appearance of your guns, too! Not only that, you can even cycle through different visual variants for the same attachment—tinker with the appearance of your gun right down to the frame, barrel, and magazine, alongside your custom camo or paintjob!
Visit the Gunsmith in the menu to view and customize any gun in the game. You can set up different variant weapons any time you want and select them as ‘templates’ on any class to instantly equip a specific weapon with a specific set of attachments and a custom paint scheme.