Bore-up kit designed for tuning AEG M4A1/SR16 and M733 standard TM replicas. The use of the kit with an enlarged diameter makes it possible to achieve higher exhaust velocities without stressing the other componentsóof the replica using the same mainspring.The kit includes:
- enlarged diameter cylinder head with underwateróy gasket,
- enlarged diameter piston head (directional),
- enlarged diameter cylinder,
- sealed enlarged diameter nozzle.Purpose: TM M4A1/SR16/M733
Manufacturer: Guarder.
