This is the OEM front flip sight that is equipped with the KRISS Vector and DMK22 firearms. This sight is extremely low profile designed to tuck completely out of vision when folded sitting a mere 12.7mm above the rail surface. The KRISS Low Profile Front Sight features a very wide range of elevation adjustment accommodating for a large spectrum of firearms with various height over bore and sight radius measurements. Finally the large textured adjustment knob makes elevation changes with gloves simple and easy. Torque spec is 2 Nm (1.48 ft-lb). Sight adjustment based on 14.5″ sight radius. Top of post width 0.059″/1.5 mm.