Adcor Defense is a firearms manufacturer located in Baltimore, Maryland.

Adcor Defense advertises that all their weapons and accessories are made in the United States.

[2] On July 17, 2013, Adcor Defense announced it would not protest the Army's decision to terminate the program.

The company will instead focus on providing the ADCOR A-556 ELITE to commercial customers for sporting and hunting.

Adcor also emphasized that it is willing to support weapon improvement programs in the U.S. military, including the M4 Product Improvement Program (PIP) and any future calls for designs for new rifles.