**IMPORTANT: You must check the accompanying photo to ensure your Sig P320 M17 has the same optic cut from Sig Sauer.
This is a aluminum optic mount with stainless steal threads for the Sig Sauer P320 M17 pistol or X5 LEGION. It uses the factory threaded holes to mount the plate to the slide. New screws, hex wrenches and thread locker provided. .65 oz
**Designed to only fit the Sig Sauer M17, M18, X-Compact, X-Full and X-Five Legion slides. WILL NOT FIT OTHER MODELS and may not work on Military issue M17 models or commemoritive editions**
Does NOT work with the RX, RXP, X-Five/X-Carry, V-TAC or Pro/LE Pro P320 models.