This is a 20mm under-barrel rail/outer rail for the Tokyo Marui Python PPC Custom 4-inch. The image is an example of the actual Python PPC Custom 4-inch installed. Insert from the tip of the muzzle and fix by tightening the grub screw with a 2mm hex wrench. A 2mm hex wrench is not included, so please prepare one. Please note that we have not confirmed its attachment to other products. This product is manufactured using a 3D printer and the material is PLA. There are layers unique to 3D printers. We will replace the product if it is damaged, but basically, please no claims, no returns. Gun body and magazine body are not included. ※Ships via Yu-Packet. ● Points to note ・Although it is made with a durable design, it may break if excessive force is applied. ・Due to the nature of 3D printer products, there may be layer marks, burrs, stringing, and some printing irregularities. The product may deform in high-temperature environments of 70-100°C. We are not responsible for injuries caused by incorrect handling. ・Product specifications are subject to change without notice. Please purchase only if you understand the above precautions. Manufacturer... Tokyo Marui Type... Air cocking gun Type... Revolver System... Revolver/Magnum System Name... Python Inches... 4 inches