The TAPP Green Gas Drum is a 400-round green gas drum (AW Custom) for your MARUZEN MP5 that bolts on with no HPA setup.
Spec card
| Type | Green Gas Drum |
|---|---|
| Feeds from | Green gas (GBB) drum |
| BB capacity | 400 |
| Overall profile | Large |
| Recommended mags | AW Custom |
| Best for | Plug and play, no HPA setup needed |
Color options
- Black: 400-round AW Custom green gas drum in black
- Red: 400-round AW Custom green gas drum in red
- Green: 400-round AW Custom green gas drum in green
- Green/Black: 400-round AW Custom green gas drum in green/black
- AW Adapter Only: adapter only, for an AW green gas drum you already own
Compatibility
| Brand / Platform | Compatibility Verification | Tuning & Adjustment Notes |
|---|---|---|
| Maruzen MP5K / Charger GBB Series | Direct Native Fit | Direct OEM factory standard. Fine-tune the gasket height flush to the loading nozzle to ensure optimal compression seal and gas pressure retention during high-rate-of-fire full-auto bursts without causing bolt drag. |
| WELL G55 MP5K GBB Series | Verified Fit (Minor Adjustment) | Direct structural clone of the Maruzen system. Due to body casing and magazine catch tolerances on budget clone receivers, fine-tune gasket height to eliminate top-seal air gaps against the feed nozzle. |
| WE-Tech Apache / VFC / TM MP5 GBB Series | NOT Compatible | Modern WE Apache, VFC, and TM MP5 GBB platforms utilize proprietary trigger box geometry, distinct output valve locations, and different gas router seal profiles that do not align with legacy Maruzen-spec magwells. |
What's in the box and how to install
- Plug and play: no pulling valves or feed lips from stock mags.
- Materials: standard body is Nylon PA12. Carbon Fiber is available (3x stiffness, up to 38% higher tensile strength than Nylon 12).
- Made in the USA by TAPP Airsoft.
- Install: insert with the bolt or slide locked back.
- Warranty: 30-Day Warranty + Lifetime Support.
More options
Also available for: VFC MP5, WE MP5 Apache
Want to compare every option? Use the MARUZEN MP5 Adapter Builder.
