"Night Fisions Optic Plate + Backup Sight combo combines precision machining with enhanced low-light capability. Alongside our rugged, nitride-coated 17-4 stainless steel optic plate, this set includes a lower 1/3rd co-witness backup sight setup featuring a tritium front sight and a blank rear with anti-glare serrationsideal for those who prefer a simplified, intuitive sight picture when transitioning between red dot and irons. This combo gives shooters an all-conditions solution without compromising performance. Specifications for Night Fision Holosun 507K Adapter Plate + Tritium Ylw Front Sight Combo: Manufacturer: Night Fision Fabric/Material: 17-4 Stainless Steel Color: Black Features of Night Fision Nf Optic Plate + Tritium Ylw Front Sight Combo: 507k To Glock 43x Mos Includes Night Fision Pistol Optic Plate Includes 260-267 height backup sights: tritium front sight with blank rear for lower 1/3rd co-witness Tritium front provides enhanced low-light visibility Rear sight is blank with anti-glare serrations Compatible with Glock 43X/48 MOS models Fits Holosun 507K and other compatible optics (see Pairing Guide) Optic plate machined from 17-4 Stainless Steel, nitride coated for durability Optic plate thickness: .08 Extra screws and installation tool included" Package Contents: Night Fision Nf Optic Plate + Tritium Ylw Front Sight Combo: 507k To Glock 43x Mos What firearm models does the manufacturer say Night Fision Holosun 507K Adapter Plate + Tritium Ylw Front Sight Combo is compatible with? The manufacturer suggests that Night Fision Holosun 507K Adapter Plate + Tritium Ylw Front Sight Combo is compatible with Springfield Armory Hellcat, Glock 43X MOS