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30 DAYS Warranty + lifetime support

Compatible With 20+ Platforms



Lower Cerakote Color

Default is Black, no Cerakote applied. Cerakote adds 7-15 days to production time.
*Drum Cerakote is only the front of the drum

None Graphite Black +$15 Bright White +$15 USMC Red +$15 NRA Blue +$15 Multicam Bright Green +$15 Magpul Flat Dark Earth +$15 Gold +$15

Extended Warranty

1-year US | 90-days International “No Questions Asked”

Free US Shipping On Orders Over $200 With Code "Freeship"
30 Day Warranty + Lifetime Support *

Product Details


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KWA MP7 HPA Drum Details

TAPP HPA Adapter

Use regular AEG mags in your GBB. Powered by High Pressure Air (HPA)
Pre-Built, Plug-and-Play, the Gas Blow Back HPA Adapter!
Concepted, Designed, Assembled, MADE in USA


– Use standard AEG magazines (M4, MP5, Drum, etc.) in your GBB platform
– HPA powered, we suggest 100-125 PSI. (HPA kit not included:
One-Piece Magazine-Adapter Design for better functionality and performance:
– Advanced BB feeding/retention system to prevent wasting ammo and more mag compatibility
– Single stack BB flow from source to feed lip (No insert or double stacking)
– No connection between magazine and adapter (Fewer o-rings, better air seal)
– SLS Nylon PA12 material for lightweight durable construction (Adapter weighs less than 5 ounces)

What’s included:

– The whole nine yards; Tapp adapters come fully assembled, no need to sacrifice an existing magazine for parts
– HPA Foster Fitting (US Spec)
– Multiple gas route gaskets (swap and test for best adapter to nozzle air seal)

We don’t want our customers to make a mistake during installation, so we do it for you. Because of this, we include a 30-day warranty for the entire adapter.
We also offer lifetime support for technical issues and replacement parts (fees apply).

Compatibility: For KWA H&K MP7 series Airsoft SMG GBB rifles (Not compatible with VFC or TM MP7’s)

30 Day Warranty + Lifetime Support

All Tapp Airsoft products include a 30-day warranty. We also offer lifetime support for technical issues and replacement parts (fees apply).


2 reviews for KWA MP7 HPA Drum

  1. Alan T

    I contacted tap airsoft Thursday night through their customer service line I was needing a MP7 custom HPA Drum mag . These guys went above and beyond to process my order and to get it out today 9/12/2019 for me to have for an event next week I recommend Tapp airsoft to anyone needing HPA drum Magazine. Some drums are custom-made and do take longer to process but these guys are awesome and I recommend you dealing with tap anytime The customer service chat room is outstanding….Thanks Again Tapp for your help…

  2. Zach S

    So far so good with my first purchase of a complete drum mag for my KWA MP7! Chatted with the team via Facebook and they seem like great people. Very willing to help troubleshoot any issues you may be having with your product, and all around good customer service. Website is nice and I actually got my drum earlier than the estimated 2-4 week production time so that was a nice bonus. The Drum fed flawlessly during my first fielding of it and the air seal seems perfect, no audible leaks! Plus it’s pretty light too. I’ll probably be getting more into the GBBR world thanks to the tapp airsoft drums!
    5 stars

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