This gearbox is identical to the original gearbox that comes standard in a M4A1 Gen 8 although the shell is made of nylon which gives needed strength if you're looking to mod in the future.
- M4A1 Gen 8
- MP5 V2
- Saw M249 V3
*Your blaster may be compatible even though it isn't listed please send us a message if you're unsure.
- Gen 8 Gearbox [Nylon]