

M4 AEG Piston Head, Nozzle, Cylinder Head & Cylinder Upgrade Set
Ribbed stainless steel heat dissipation, low friction cylinder with double O-ring silent cylinder head and matched silent ball bearing piston head, plus a CNC machined air seal M4 nozzle.
Suitable for all V2 gearboxes and perfect for any gearbox upgrade on an M4 AEG.