Specification Brand : Ade Advanced Optics BulletPoint1 : This mounting plate is designed to connect red dot sights to Ruger Mark I, II, III, IV, IV-Lite, 22/45 pistol. For Mark I and II, confirm it has drilled/tapped holes. Plate will not work without holes. BulletPoint2 : Also fit Doctor, Vortex Venom/Razor/Viper, Burris Fastfire, Meopta, Eotech mrds, , Insight red dots. BulletPoint3 : Mounting hardware comes with screws and allen wrench. For Mark I and II, confirm it has drilled/tapped holes. Plate will not work without holes. BulletPoint4 : Mounting hardware comes with screws and allen wrench. Aircraft grade Aluminum in Matte black finish. Mounting hardware comes with screws and allen wrench. We are learning that depending on the date of production batches of the ruger mark series, some pre-drilled holes are slightly shorter/shallower. If so, please contact us, we will send you shorter screws. We are in the process of adding shorter screws, but it is not factory included til next production. BulletPoint5 : This optic plate is designed to attach to the two existing holes on the top of Ruger Mark Slide. No need to replace the rear sight and allowing user to co-witness the rear sight. BulletPoint6 : Included components: Screw #8-32 x2, Torx Head,Allen Wrench T20 Trox Color : matte black CompatibleDevices : Cameras CompatibleWithVehicleType : Bicycle CustomerPackageType : Standard Packaging Department : unisex-adult DriveSystem : Torx ExteriorFinish : Black Oxide ExternallyAssignedProductIdentifier1 : 4717385554146 ExternallyAssignedProductIdentifier2 : 04717385554146 ExternallyAssignedProductIdentifier3 : 00076683497161 GradeRating : Class 12.9 ImportDesignation : Imported IncludedComponents : Screw #8-32 x2, Torx Head,Allen Wrench T20 Trox ItemDisplayWeight : 0.2 pounds ItemName : Ade Advanced Optics Ruger Mark I, II, III Mark 1,2,3,4 Red-Dot Sight Mount Fit Vortex Venom, Docter, Burris Fastfire Optics ItemPackageDimensions_Height : 7.2898 centimeters ItemPackageDimensions_Length : 0.9906 centimeters ItemPackageDimensions_Width : 4.4958 centimeters ItemPackageQuantity : 1 ItemShape : Rectangular Prism ItemTypeKeyword : airsoft-gun-scope-mounts Manufacturer : Ade Advanced Optics Material : Aluminum MaximumShearStrength : 90,000 psi MeasurementSystem : Imperial MetalType : Alloy Steel ModelName : AIR31834AB ModelNumber : AIR31834AB MountingType : Dovetail Mount NumberOfBoxes : 1 NumberOfItems : 1 NumberOfPieces : 12 PackageLevel : unit PartNumber : MK2 Pattern : Solid ProductDescription : The plate fits following models. Mark I – MUST confirm it has drilled/tapped holes Mark II – MUST confirm it has drilled/tapped holes Mark II 22/45 – MUST confirm it has drilled/tapped holes Mark III Standard Mark III Bull Barrel Mark III Competition Mark III Hunter Mark III 22/45 Lite Mark III 22/45 Target Mark III 22/45 Threaded Barrel Mark III 22/45 Bull Barrel Mark III 22/45 Hunter Mark IV Standard Mark IV Target Mark IV Hunter Mark IV Competition Mark IV Tactical Mark IV Hunter Mark IV 22/45 Lite Mark IV 22/45 Tactical ProductSiteLaunchDate : 2020-03-20T07:00:00.000Z Size : Medium SportType1 : Airsoft SportType2 : Hunting StreetDate : 2011-02-01T00:00:01Z Style : Modern SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 12 UnspscCode : 41111700 WarrantyDescription : The Best Never Rest Warranty - Lifetime WaterResistanceLevel : not_water_resistant