The SHIELD SIGHTS RMSc Compact Reflex Mini Red Dot Sight is a slimmed-down version of the RMS designed to fit on single-stack EDC pistols like the G43, Smith & Wesson Shield, and 1911. It's the original compact red dot, and it's still the gold standard. 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. Designed to fit slim, single-stack pistols 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