The Holosun 507 Red Multi-Reticle Open Lens Solar Shake Awake 7075 Aluminum Miniature Pistol Reflex Sight is a versatile reflex optic designed for fast target acquisition and rugged reliability on pistols. It features a multi-reticle system with a bright red 2MOA dot, an 8MOA circle, and a combined 2MOA dot inside the 8MOA circle, giving shooters flexible sighting options for different shooting scenarios. The open-lens design provides a wide field of view with unlimited eye relief and parallax-free performance at typical handgun distances. Built from durable 7075-T6 aluminum with a hard-anodized finish, the sight incorporates Shake Awake technology to preserve battery life and solar-assisted power management to further extend runtime on a single CR2032 battery. With 1MOA windage and elevation adjustments and an IP67 waterproof rating, the HS507C-RD-X3 delivers dependable performance for competition, duty, and everyday carry pistols.