The RMSx (Reflex Mini Sight XL) is designed for competitive shooters and features an 80% larger window for a larger sight picture with a reinforced glass lens to handle long days on the range. The optic is compatible with SHIELD Sights' universal RMS/SMS footprint for backwards compatibility with existing firearms and retains the all the legacy features of the original SMS and base RMS model including the all-aluminum housing, IP67 waterproof rating, auto brightness adjustment and a 20,000-hour operational life on a single CR2032 battery. This model features an all-black finish with a 4 MOA dot reticle. One CR2032 battery is included along with a mounting kit that consists of a shim, two sets of mounting screws (2x M4x8mm; 2x M4x10mm), two hex tools (1.5 & 2.5), four nylon washers and a battery cover. A plastic optic cover is also included for additional protection during storage and transportation.