Holosun HS503GU Red Dot Sight Review
This review of the Holosun HS503GU red dot sight highlights its dual reticle system (2 MOA dot or 65 MOA circle with 2 MOA dot), easy battery access via a side-mounted CR2032 compartment, and robust construction. Tested extensively on an AR-15 pistol, the sight demonstrated reliability with over 400 rounds fired, maintaining zero and showing no power issues. It features a 20mm objective lens for a wide field of view, lower 1/3 co-witness, and half MOA adjustments.











