All red dots are not created equal. The FreedomA(R) RDS (red dot sight) changes the game when it comes to consistency and durability in a red dot sight. It's everything you need in a red dot and nothing you don't. And like all Leupold riflescopes, it's designed, machined, and assembled in the USA and guaranteed for life. 1 MOA Dot for precise shot placement Wide field of view MST Motion Sensor Technology Waterproof, Fogproof, & Shockproof 34mm Main Tube, for best mounting results, use 34mm scope rings. Mfg: Leupold