This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Replaced white background with transparency and saved in PNG to maintain the new background. The original can be viewed here: M4A1 ACOG.jpg: . Modifications made by JayCoop.
This file is a work of a sailor or employee of the U.S. Navy, taken or made as part of that person's official duties. As a work of the U.S. federal government, it is in the public domain in the United States.