Holosun 507C Adapter Plate for 407/507K Series Red Dot Sights

The Holosun 507C Adapter Plate bridges one of the most common optics compatibility gaps in the modern pistol world. If you've got a red dot sight mounted on the 407/507K footprint but need to switch to a pistol with a Holosun 507C pattern, this adapter plate lets you make that transition without replacing your optic. It's a straightforward solution for shooters with multiple pistols or those upgrading their slide-mounted optics setup.

Running multiple competitive or duty pistols? Changing platforms for a new build? This adapter plate gives you the flexibility to keep your existing red dot in the fight instead of buying another one. Holosun's engineering makes this a reliable, no-fuss way to maintain compatibility across different firearm platforms.

Fast sight picture and target acquisition are critical whether you're shooting IDPA, USPSA, or carrying for personal defense. Keeping your proven optic in the fight—even across different pistol footprints—means you stay familiar with the glass you trust, and you don't leave money on the table replacing a sight that works.

Specifications

Frequently Asked Questions

Will this adapter plate fit my 407K or 507K red dot?

Yes. This plate is designed to adapt 407/507K series red dot sights to mount on pistols with the Holosun 507C footprint pattern.

What pistols use the 507C mounting pattern?

We don't have a specific compatibility list in our product data. Contact Holosun directly or consult your pistol's documentation to confirm whether your slide accepts the 507C footprint, or reach out to our team for guidance on your platform.

Can I use this to move my optic between guns?

Exactly. If you have a 407/507K mounted optic and want to move it to a 507C-pattern slide, this adapter plate makes that possible without buying a new sight.