The Holosun 407/507K adapter plate for the HS507C footprint (part no. KPLT-507C) lets a shooter mount a Holosun 407K or 507K series optic onto a slide cut for the HS507C’s Trijicon RMR footprint. Holosun machines the plate as a red dot optic mount measuring 1.78 inches, bridging the gap between the compact K-series footprint and the widely supported RMR standard. Among footprint-bridging red dot mounts, this 407/507K adapter favors owners of RMR-cut slides who want to run a compact K-series Holosun optic instead.

Key Specifications

• The plate adapts 407K or 507K series optics to a Trijicon RMR footprint slide cut.
• The plate measures 1.78 inches in length.
• The mount type is built specifically around the HS507C footprint pattern.

Frequently Asked Questions

What footprint does this adapter bridge? It adapts Holosun 407K/507K series optics to a Trijicon RMR-footprint slide cut.

How long is this adapter plate? 1.78 inches, sized to bridge the two mounting patterns securely.

Buy the Holosun 407/507K to HS507C Adapter

A secure bridge between the RMR footprint and Holosun’s compact K-series optics is exactly what this adapter plate delivers. This adapter is temporarily unavailable to ship immediately — order confirmation and availability updates are handled at checkout, and our Lubbock, Texas gun shop will get it to you with fast, insured shipping as soon as it’s ready.