Optex Systems Holdings, Inc. sells optical sighting systems and assemblies to various markets in the United States, including the U.S. department of defense, foreign military applications, and commercial markets. Their products range from periscopes, sighting systems, howitzers, applied optics center, and other optical systems that are installed on various types of U.S. military land vehicles. The company provides its products directly to federal government, prime contractors, and foreign governments as a subsidiary of Sileas Corporation.