This is an aluminum optic mount with stainless steel threads for the Sig Sauer P320 M17 pistol or X5 LEGION. We have mounts specifically for:

Holosun 407c/507c/508T/507 COMP 

The mount is specific to the optic. It uses the factory threaded holes to mount the plate to the slide.  New screws, hex wrenches and thread locker provided.

**IMPORTANT: You must check the linked video below to ensure your Sig P320 M17 has the same optic cut from Sig Sauer.

Identify your slide

Installation Instructions

**Designed to only fit the Sig Sauer M17, M18, X-Five Legion, X-Full, X-Carry Legion, and X-Compact without the rear dovetail. WILL NOT FIT OTHER MODELS and may not work on Military issue M17 models or commemorative editions**

Does NOT work with the RX, RXP, X-Five/X-Carry, V-TAC or Pro/LE Pro P320 models. Click Here for Installation Instructions