These suppressor sights are made in house here at Shepherd Tactical Supply. They are made from 4140 tool steel on CNC mills and then finished in black oxide. The front sight is grooved and also has a cool cut out design. The rear sight is grooved on the front and back. It comes with Qty (2) 4-40 x 5/16 set screws. This will make a great addition to your pistol. Front Sight is 0.395″ Rear sight is 0.418″