The TAPP Drum Adapter puts a 400-2,500+ round drum on your KWA USP Compact 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 |
|---|---|---|
| KWA / KSC USP Compact GBB Pistol Series | Direct Native Fit | Direct OEM factory standard for KWA / KSC USP Compact (USPC) series 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 rapid recoil recovery without creating drag on the returning compact slide assembly. |
| Tokyo Marui / Umarex VFC / WE-Tech USP & Full-Size KWA Lines | NOT Compatible | Third-party USP platforms (Tokyo Marui, VFC, WE-Tech) and full-size KWA models utilize distinct magwell channel dimensions, magazine retention catch heights, and non-matching gas router seal profiles incompatible with KWA USP Compact NS2 architecture. |
Note: this is a one-way fit — the full-size KWA/KSC HK45 & USP HPA Adapter/Drum also works in the USP Compact, but this Compact-specific adapter will not fit the full-size USP, USP Match, or HK45.
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: KWA/KSC HK45 & USP
Want to compare every option? Use the KWA USP Compact Adapter Builder.
