Full Internal Upgrade Kit for M4A1 V8 Gel Blaster
* Does not come with shims, these need to be purchased separately
M4A1 V8 by JinMing
1 x Gen 8 Singularity Nylon Gearbox Shell
1 x Metal tooth piston with metal piston head and upgraded o-ring.
1 x Metal upgraded red cylinder.
1 x Metal 18:1 gear set.
1 x Set of 8mm bushings.
1 x ChiHai Red high speed upgraded motor
1 x Upgraded straight trigger
1 x Upgraded polished metal internal barrel
1 x Upgraded silver wiring kit
1 x Spare t-piece
1 x Replacement tappet plate