The EOTech Model 517 is designed to easily accommodate many firearms operating on cost-effective "AA" batteries, the Model 517 is both durable and submersible up to 10 ft and offers side buttons, making this a perfect match for an EOTech magnifier. Mounts directly to any MIL-STD 1913 rail and is repeatable to within 1 MOA after re-mounting. Uses 2 AA batteries (supports lithium, alkaline or rechargeable) with a run time or 1,000 hours (lithium) or 600 hours (alkaline) on brightness setting 12.
AR-15, Issue:09, Page:094
Big Book Catalog, Issue:66, Page:267
Mini-Catalogs, Issue:04, Page:010
New Product Supplement, Issue:621, Page:023