Have you lost some of the hardware when you took apart your optical guns. There is a solution, new Optical Gun Hardware Kits. Kits contain all the screws and nuts (where required) to re-assemble your optical guns. Keep several kits on hand. Includes: (3) 6-80cm x 0.6cm Torx Screws, (1) 6-80cm x 1cm Torx Screw, (2) 10-32 Hex Nuts, and (2) #4 Sheet Metal Screws. Item is a component in the following :Incredible Technologies: Big Buck Hunter; Midway:Carnevil.