The United States Armed Forces authorize certain medal and ribbon devices that may be worn if authorized on a defined set of United States military decorations and awards.
The devices are usually made of brass or metal alloys that appear gold, silver, or bronze in color with either a dull or polished look.
These are sometimes referred to as award devices, but are most commonly referred to in service regulations and Department of Defense instructions simply as "devices" for awards and decorations.
On January 7, 2016, the Secretary of Defense approved two new devices for medals and ribbons: a "C" Device which will be affixed to multi-purpose performance awards in recognition of meritorious service under combat conditions and, an "R" Device which will be affixed to non-combat performance awards to specifically recognize remote but direct impact on combat operations.
[5] Both of the devices will be worn if authorized for wear, on specific decorations.