This mounting plate kit includes:(x1) Optics plate(x3) M4 x 6 MM M3H Plate Mounting Screws(x3) 4-40 x .320 FHB Trijicon RMR Optic Mounting Screws(x3) 4-40 x .280 FHB Holosun 507C / 508T Optic Mounting Screws(x3) 4-40 x .345 FHB Trijicon SRO , CHPWS COMP / EDC XL Optic Mounting Screws(x3) 4-40 x .250 FHB Optic Mounting Screws(x3) Patented 416 Stainless Steel T-Nuts C& H Precision RMR Footprint Steel Optic Plate for Sig P320 Legion/M17/M18 Handguns w/Glock Sight Dovetail SGX-RSH-GDT