JM Gen8 Gen9 Gen10 Upgrade Gearbox Parts Type:for gen9 gen10 can be used for a

can be used for a very long time

Material: 800D Oxford Cloth

Package content: 1x jm gen8 or gen9 metal mag release

including robust TPU

Made of high-strength polymer

JM Gen8 Gen9 Gen10 Upgrade Gearbox Parts Type:for gen9 gen10 can be used for aJinming 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