The RMSd features an all-aluminum construction offering greater recoil resistance while retaining a light weight. The optic also features a quick-release side drawer that allows for easy battery changes without removing the sight and losing zero. The RMSd sports a low-profile design for easy co-witnessing and retains the auto brightness adjustment function along with an IP67 waterproof rating of the original SMS. The optic uses CR1632 batteries and boasts a 9000-hour operational life. This model comes in a glass lens configuration and features an all-black finish along with a 4 MOA dot. One CR1632 battery is included along with a mounting kit consisting of two sets of two screws (2-M4x8mm; 2-M4x10mm), two hex wrench tools, four nylon washers, and one Reece's Law battery cover. An optic cover is also included for storage and transportation use.