The Holosun HS507C Micro Red Dot System is a pistol-sized optic that will help you nail your targets with pinpoint accuracy. Thanks to their CR2032 batteries, these Red Dot Sights by Holosun can last up to 10 years on a single battery. Plus, the HoloSun Red Dot Sight has a Solar Fail-safe backup to harness the power of the sun when you need it most. If you're seeking a parallax-free sight with unlimited eye relief, the Holosun Red Dot Pistol Optic is the perfect choice for beginners and experts alike.