Williams Gun Sight Aluminum Slot Blank Black. OpticsPlanet is an Authorized US Distributor for Williams Gun Sight Gun Parts. Black anodized aluminum with lock screw. Fits 3/8 inch dovetails. Specifications for Williams Gun Sight Aluminum Slot Blank: Manufacturer: Williams Gun Sight Color: Black Fabric/Material: Metal Gun Type: Rifle Package Contents: Williams Gun Sight Aluminum Slot Blank We offer the complete line of Williams Gun Sight Gun Parts. For our complete selection of products by Williams Gun Sight Company on sale please visit our Williams Gun Sight Company page. For more Gun Parts please visit our Gun Parts store section. Williams Gun Sight 1951: Aluminum Slot Blank Black