The TAPP Green Gas Drum is a 400-round green gas drum (AW Custom) for your KWA/KSC ATP & KelTec SUB2000 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 ATP & ATP LE GBB Pistol Series | Direct Native Fit | Direct OEM factory standard for KWA / KSC ATP (Adaptive Training Pistol) and ATP LE models utilizing the System7 / NS2 engine. Fine-tune the adjustable gasket height to establish an airtight compression seal against the loading nozzle seal, ensuring maximum gas efficiency and smooth recoil recovery without creating drag on the returning slide assembly. |
| KelTec SUB2000 GBB Carbine | Direct Native Fit | Direct fit for the KelTec SUB2000 GBB carbine. Fine-tune the adjustable gasket height to establish an airtight compression seal against the loading nozzle seal, ensuring maximum gas efficiency and smooth bolt/slide recoil recovery without creating drag on the returning assembly. |
| KWA / KSC ATPZ GBB Pistol | NOT Compatible | The ATP and ATPZ are not cross compatible. This adapter/drum will not work in the ATPZ. If you have an ATPZ, please see the KWA/KSC ATPZ HPA Adapter/Drum. |
| Tokyo Marui / WE-Tech / VFC G-Series & Non-System7 Pistol Lines | NOT Compatible | Third-party Glock-pattern platforms (Tokyo Marui, WE-Tech, VFC) and non-System7 KWA pistol series utilize distinct internal magwell channel dimensions, non-matching valve striker placement, and proprietary gas router seal profiles incompatible with KWA ATP NS2 architecture. |
Own a KWA / KSC ATPZ? It is not cross compatible with the ATP. Get the correct one here: KWA/KSC ATPZ HPA Adapter/Drum.
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: G-Series/GLK, GHK GSeries/GLK, VFC GSeries/GLK, Elite Force GLK 42, Maruyama SCW-9 (GSeries)
Want to compare every option? Use the KWA/KSC ATP & KelTec SUB2000 Adapter Builder.
