Ruger Mark Series Micro Red Dot Adapter MountSmall optics require a small mount! With the increase in micro carry optics on the market, OuterImpact is excited to announce the all new Ruger Mark Series Micro Red Dot Adapter Mount. The Micro Red Dot Adapter Mount is designed to add minimal weight and height to your carry pistol and securely accept a variety of micro red dot sights on the market including: Holosun 407K 507K C models require the MRA adapter Swampfox SentinelShield Sights RMScSig