The body and the three sight bodies are made of anodized aluminum with fiber optic fluorescent sight rods. All hardware made of anodized steel or stainless steel.
The shotgun sight is placed on the end of the shotgun. The body is shaped like a T and has a stationery red sight in the center of it, with a slot on both sides. The top of the T has a slight radius to it. The green sights are placed in the slots, with equal distance from the center sight. When looking at the sight down the barrel of the gun the space between the red and green sights is known as the Angle of Lead.
Example: The space between the red and green sights (either side) will be 1 1/2" at the end of the barrel. The target is crossing at 20 yards from the right going left. If you place the green sight on the right side of the sight on the target, it will put the red center sight in front of the target giving you about a 20" lead (the distance will very from gun to gun based on the sight settings). Because of the radius of the sight the distance will change if the target is closer or further out, so what this means is the same target at 30 yards the lead will increase , 10 yards the lead will decrease, with out changing the settings. Please see the chart below for a reference.