Built for mounting on a wide range of optics-ready handguns, the SHIELD SIGHTS RMSd Mini Red Dot Sight is the benchmark for durability and performance. Machined from aerospace aluminum and nitrogen-sealed to be 100% waterproof, it features a large, crystal-clear lens with no filters to obscure your view of the target. Utilizing Shield's patented mechanism, it enables co-witnessing with standard iron sights allowing for more effective training and better targeting. The RMSc features auto-brightness adjustments, so it's always on and always ready. And it features continuous, no-click adjustments for windage and elevation, so it's ultra-precise when zeroing. Side-accessible battery drawer means you don't have to remove the sight to swap the battery. Up to 9,000 hours of battery life on a CR1632 battery (included). Fits standard SHIELD footprint. Designed for use on optics-ready handguns Fits the standard Shield footprint Enables co-witnessing with standard iron sights Aerospace aluminum construction Nitrogen-sealed, submersible to 30' for 30 seconds Automatic brightness adjustment Up to 9,000 hours battery life on a CR1632 battery (included)