JM Gen8 Gen9 Gen10 Upgrade Gearbox Parts Type:for gen9 gen10 Material: Injection Molding Nylon +

Material: Injection Molding Nylon + Metal

Size:  46

Made of high-strength polymer

including robust TPU

can be used for a very long time

JM Gen8 Gen9 Gen10 Upgrade Gearbox Parts Type:for gen9 gen10 Material: Injection Molding Nylon +Jinming Gen8 Gen9 Gen10 Upgrade Metal Replacement Accessories Kit for scar and jm gen8 m4a1 or jm gen9 gen10 gel blaster gearbox upgrade. j8 package includes: 1x 18: 1 metal gears. 1x piston with metal ladder. 1x steel cylinder. 1x high speed 460 motor 30000rpm. 1x 1. 2mm hardened spring 14cm. J9 J10 upgrade package includes: 1x 18: 1 metal gears 1x piston with metal ladder 1x steel cylinder 1x high speed 470 motor 45000rpm 1x 1. 2mm hardened spring