The TAPP Drum Adapter puts a 400-2,500+ round drum on your WE M1A1 Thompson for suppressive fire.
Spec card
| Type | Drum |
|---|---|
| Feeds from | Drum magazine (pre-installed) |
| BB capacity | 400-2,500+ |
| Overall profile | Medium to Large |
| Recommended mags | Tokyo Marui or Angel Custom drum |
| Best for | Suppressive fire and general skirmishes |
Drum options
- 400rd Mini: 400-round mini drum
- 1500rd Flash: 1,500-round flash drum
- 1500rd Electric: 1,500-round electric drum
- 1500rd Electric Tan: 1,500-round electric drum in tan
- 2000rd Flash: 2,000-round flash drum
- 2000rd Electric: 2,000-round electric drum
- 1200rd Twin: 1,200-round twin drum
- Adapter Only – Angel Custom: adapter only, for an Angel Custom drum you already own
- Adapter Only – TM Mini: adapter only, for a Tokyo Marui mini drum you already own
- Adapter Only – TM Twin: adapter only, for a Tokyo Marui twin drum you already own
- Adapter Only – A&K: adapter only, for an A&K drum you already own
- Adapter Only – ICS: adapter only, for an ICS drum you already own
Compatibility
| Brand / Platform | Compatibility Verification | Tuning & Adjustment Notes |
|---|---|---|
| WE-Tech M1A1 Thompson Open Bolt GBBR Series | Direct Native Fit | Direct OEM factory standard for WE's Thompson M1A1 submachine gun architecture. Fine-tune the adjustable gasket height to ensure a firm, compression-sealed interface against the loading nozzle without introducing bolt drag during full-auto cycling. |
| Tokyo Marui / WE-Tech / Northeast WWII GBBR Lines | NOT Compatible | Third-party electric (AEG) and non-WE historic gas platforms utilize distinct magazine channel dimensions, locking catch heights, and gas router seal contours that are entirely incompatible with the WE Thompson magwell. |
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. US-spec Foster fitting included, never exceed 150 PSI, use a secondary low-pressure regulator.
- Warranty: 30-Day Warranty + Lifetime Support.
More options
Also available for: WE M14, CYMA M14 AEG
Want to compare every option? Use the WE M1A1 Thompson Adapter Builder.
