The Modify Bore Up Cylinder Set for the M16 series has all the necessary parts to upgrade the cylinder assembly of any M16 series gearbox. The Cylinder Set includes a bore up cylinder head, bore up air seal nozzle, bore up aluminum cylinder head, and bore up cylinder. Modify series of upgrade parts are compatible with most major brands of AEG. You can expect the same level of quality from these parts as Guarder and Systema parts for a fraction of the price.
Stainless Bore-Up Cylinder Head
Bore-Up Air Seal Nozzle
Bore-Up Ventilation Piston Head
Bore-Up Chromium Plating Cylinder