Shield Sights RMSc 1x Reflex Mini Sight Compact - 4MOA Dot - The RMSc is a slimmed-down version of the popular RMS, designed for single-stack pistols like the Glock 43, Smith & Wesson Shield, and 1911. Its low-profile design makes it ideal for custom builds, and when used with a compatible Glock MOS plate, it allows co-witnessing with standard iron sights without suppressor sights. The original compact mini sight for slimline pistols, it's so widely adopted that firearms have been designed around it, including models like the Glock 43X and G48. It features an ultra-clear, scratch-resistant glass lens, upgraded electronics with improved battery contacts, and retains its compact frame and co-witness capability. SHIELD footprint mount; Iron sight co-witness system; No-click zeroing; Clear D-shaped lens; Aluminum construction; 16.2g lightweight; Auto brightness; 20,000-hour CR2032 life;