Includes Night Fision Pistol Optic Plate; Includes 330-353 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 Full Size & Compact MOS models; Fits Trijicon RMR, Holosun 507c, and other compatible optics (see Pairing Guide); Optic plate machined from 17-4 Stainless Steel, nitride coated for durability; Optic plate thickness: 0.2; Extra screws and installation tool included