- CNC Aluminum Housing with detachable rear plate
- Marui Spec. G Series BBU / BBH unit ( RMR cut style )
- With Full set G18C style Nozzle, Piston seal set & Nozzle Lip
- Compatible with Guns Modifty style rear plate
- Compatible with most RMR cut Marui Style GK-series slide ( MOD may be required )
- Fit for Marui Spec. G18C GBB