Sig Sauer® P320-M17, M18, X-5 Legion Pistol 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 Sig Sauer P320 M17, M18 and X 5 Legion 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