The TAPP Green Gas Drum is a 400-round green gas drum (AW Custom) for your KWA/KSC 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 |
|---|---|---|
| KWA / KSC LM4 PTR, LM4D (10.5-inch, M-LOK & RIS PTR) & System7 AR-15 / M4 GBB Rifle Series | Direct Native Fit | Direct OEM factory standard for KWA LM4 PTR, LM4D 10.5-inch, LM4D M-LOK, LM4D RIS PTR, KSC M4 GBB, and System7 AR-15 rifle platforms. Fine-tune the integrated adjustable plunger height to establish a precise compression seal against the heavy bolt carrier loading nozzle assembly, maximizing gas efficiency and cycling reliability while preventing mechanical drag or valve striker binding during bolt return. |
| PTS Masada GBB Rifle (Black & Dark Earth) | Verified Fit (Shares KWA LM4 Magazine System) | PTS's Masada GBBR runs on the same KWA LM4-pattern gas magazine, so this adapter installs and seals the same way. Fine-tune the adjustable gasket height for consistent output across manufacturing tolerances. |
| PTS Radian Model 1 & PTS Mega Arms MKM AR-15 / AR-15 CQB GBB Rifles | Direct Fit (Shared PTS EPM Magazine) | These PTS rifles run the same PTS EPM 38-round gas magazine as the Masada, so this adapter installs and seals the same way. Fine-tune the adjustable gasket height for consistent output across manufacturing tolerances. |
| Tokyo Marui MWS / GHK / VFC / WE-Tech AR-15 GBB Rifle Lines | NOT Compatible | Tokyo Marui M4 MWS (Z-System), GHK AK/AR series, VFC AR-15 platforms, and WE-Tech open-bolt M4 systems feature entirely different upper receiver internal dimensions, magazine catch lock geometry, valve striker heights, and proprietary gas router seal profiles incompatible with KWA System7 LM4 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, KJW 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 KWA/KSC M4 Adapter Builder.
