Established in 1985, DI Optical has over 30 years of commitment to the research and development of sight solutions for small arms and machine guns. We saw our beginning as a telescope company doing OEM work for number of different companies DI Optical has evolved into a defense company making rifle and machine gun sights.. With our innovative technology and trusted relationships, D.I. Optical has supplied quality products to leading distributors in the USA, Europe and Asia. As a Certified ISO 9001:2008 company, we pride ourselves on our proven quality control process and excellent products that we offer to our customers.