The TAPP Green Gas Drum is a 400-round green gas drum (AW Custom) for your KJW M4 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 |
|---|---|---|
| KJW M4 GBB Series (V1 / V2 / V3 / Tanio Koba System) | Direct Native Fit | Direct OEM factory standard for Tanio Koba-designed KJW M4 receivers. Features an adjustable plunger to calibrate engagement depth against the internal striker pin, ensuring complete valve depression. Fine-tune gasket height to form an airtight compression seal against the rubber piston face without causing bolt carrier drag. |
| Tokyo Marui MWS / VFC / WE-Tech / WA M4 GBBR Series | NOT Compatible | Third-party M4/AR-15 GBBR platforms utilize distinct valve knocker depths, different gas router seal profiles, and non-matching magazine catch heights incompatible with KJW's Tanio Koba engine 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: VFC M4, KWA/KSC M4, GHK M4/MK18/G5, WE-Tech Open Bolt M4/M16/416/XM177/MK18/MSK/L85/SCAR-L, WA/WOC/GE/KA/Matrix/Inokatsu, SRC ZAROS SR4, G&G MGCR
Want to compare every option? Use the KJW M4 Adapter Builder.
