This Trijicon RMR/SRO adapter mount fits M17 Pistols. Designed and tested specifically to mount the Trijicon RMR® or SRO® to the Sig Sauer line of pistols. The mounts are easy to install using the existing mounting points. Each plate is precision machined to ensure reliable, durable mounting and then hard anodized to protect against the elements. Matte Black Anodized FinishPlate thickness.135”Made from Steel and weighing 32 GramsINCLUDES1 Mount2 Plate Mounting Screws2 Optic Mounting Screws Trijicon RMR/SRO Pistol Mount SIG P320 M17 AC32087