All red dots are not created equal. The Freedom RDS (red dot sight) changes the game when it comes to consistency and durability in a red dot sight. This BDC model comes with a pre-calibrated dial for 5.56/.223 55gr rounds that let's you accurately adjust the dot out to 400+ yards. Leupold took their 70+ years of optics knowledge and created a red dot that s built Leupold tough, performs in extreme conditions, and won t break the bank. It s everything you need in a red dot and nothing you don t. Includes AR-specific mount. Battery Life at Brightness 4 of 8: 1000 hours minimum RDS no mount with battery = 7.2 ounces RDS with mount, battery & BDC = 13.1 ounces