This feed neck comes with the hopper clamp built directly on the feed neck so you can reduce the height of the hopper about 2 inches. It is perfect for keeping your marker low profile for greater tactical advantage. With this feed neck you don"t need use the plastic 45 degree elbow anymore. This feed neck is 100% metal - built to out last your marker. *NOTE: This Spyder Clamp Style Feed Neck will not be compatible with markers with eye.