The TAPP Drum Adapter puts a 400-2,500+ round drum on your KWA/KSC HK45 & USP 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 HK45 & USP GBB Pistol Series | Direct Native Fit | Direct OEM factory standard for KWA / KSC HK45, HK45 Tactical, and USP series (Full Size, Match) 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. |
| KWA / KSC USP Compact | Verified Fit | This full-size adapter also seats and seals correctly in the USP Compact's magwell. Fine-tune the adjustable gasket height for the shorter compact slide travel. |
| Tokyo Marui / Umarex VFC / WE-Tech HK45 & USP Pistol Lines | NOT Compatible | Third-party HK45 and USP platforms (Tokyo Marui, VFC, WE-Tech) 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 System7 NS2 architecture. |
Have a USP Compact and only want the compact-specific listing? See the KWA USP Compact HPA Adapter/Drum — note that adapter is sized for Compact only and won't fit the full-size HK45/USP/USP Match.
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 USP Compact
Want to compare every option? Use the KWA/KSC HK45 & USP Adapter Builder.
