Home / Accessories / HOLOSUN / 407/507K Adapter for RMR 407/507K Adapter for RMR Categories: Accessories, HOLOSUN Tags: accessories, HOLOSUN Product ID: 6190 Description Description 407/507K Adapter for RMR – OVERVIEW – Related products Hunting Hat from: $3500 HS507K X2 EPS CARRY(Red/Green) 2 AEMS CORE (RED/Green)