L'Antre Du Dingo reviews the first optic offering from Olight --- the Olight Osight Red Dot Sight. The Olight Osight is compatible with most full-size and compact firearms, utilizing the industry-standard Ruggedized Miniature Reflex (407c/507c) mounting footprint. However, it may require an additional mounting plate or slide cut, and is not recommended for subcompact models.