The TAPP Green Gas Drum is a 400-round green gas drum (AW Custom) for your Umarex/KWA Beretta PMX 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 |
|---|---|---|
| Umarex / KWA Beretta PMX GBB SMG Series | Direct Native Fit | Direct OEM factory standard for the KWA-manufactured Umarex Beretta PMX SMG platform (System7 / NS2 engine architecture). Fine-tune the adjustable gasket height to establish an airtight compression seal against the bolt nozzle assembly, ensuring maximum gas efficiency and rapid cycling without creating friction against the reciprocating bolt mechanism. |
| KWA MP9 / KWA MP7 / VFC & TM SMG Lines | NOT Compatible | KWA MP9/MP7 platforms and third-party SMG models (VFC, Tokyo Marui) utilize distinct magazine shell dimensions, non-matching valve striker heights, and proprietary gas router profiles incompatible with KWA PMX architecture. |
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: KWA MP9/VMP-1, VORSK VMP2, Maruyama SCW-9
Want to compare every option? Use the Umarex/KWA Beretta PMX Adapter Builder.
