Burris FastFire sights are small, light, and tough. The powerful bright red dot makes target acquisition easier than every before. It can be used as a primary sight, or a pair on top of an existing optic or laser. The electronics and chassis of FastFire sights are built tough, so they can handle the abuse of competition and hunting. Burris Optics prides itself on being an innovator in the optics industry, and the FastFire series of sights continues that tradition. Similar to other Burris products, the warranty is forever. Burris FastFire Features: Bright-red dot allows for fast target acquisition and easy aimingParallax-free, for better accuracyIndex-matched, Hi-Lume multicoating provides low-light performance and glare eliminationWindage and elevation adjustments make fine-tuning easyHigh-grade optical glass provides excellent brightness and clarity, with lasting durabilityWaterproofNitrogen-filled body tubes prevent internal fogging in the cold and rainShockproof design stands up to years of punishing recoil Burris AR-F3 Flatop FastFire Sight Red Dot 3 MOA 300215