The TAPP Green Gas Drum is a 400-round green gas drum (AW Custom) for your HFC M11 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 |
|---|---|---|
| HFC M11 / T77 GBB Series | Direct Native Fit | Direct OEM factory standard. Fine-tune the gasket height to establish an airtight compression seal against the loading nozzle assembly, ensuring optimal gas transfer and reliable feeding during high-rate-of-fire operation without bolt drag. |
| KSC / KWA Legacy M11A1 (Pre-NS2 / Hard Kick I & II) | Verified Fit (Tuning Recommended) | HFC utilizes the older pre-NS2 KSC/KWA internal gas system geometry. Fine-tune the gasket height to ensure the gas router seals flush against the older-style loading nozzle face without causing friction during rapid bolt cycling. |
| WELL G11 / M11A1 GBB Series | Verified Fit (Minor Adjustment) | Shares the same legacy pre-NS2 platform architecture. Due to minor manufacturing variances in receiver magazine catch heights, fine-tune gasket elevation to eliminate seal air gaps and prevent gas leakage. |
| KWA M11A1 NS2 / KSC System 7 M11 Series | NOT Compatible | Modern KWA NS2 and KSC System 7 models use updated internal gas architecture with completely different release valve locations, gas router profiles, and feed lip dimensions that will not seat or seal in HFC-pattern 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: KWA M11
Want to compare every option? Use the HFC M11 Adapter Builder.
