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KJW M4 HPA MP5 Adapter

KJW M4 HPA MP5 Adapter

Regular price $355.00 USD
Regular price Sale price $355.00 USD
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The TAPP MP5 Adapter lets your KJW M4 run regular AEG MP5 magazines.

Spec card

Type MP5
Feeds from AEG MP5 mags
BB capacity 65-110+
Overall profile Medium
Recommended mags CYMA, MAG or Matrix mid-cap
Best for Secondary

Compatibility

Brand / Platform Compatibility Verification Tuning & Adjustment Notes
KJW M4 GBB Series (V1 / V2 / V3 / Tanio Koba System) Direct Native Fit Direct OEM factory standard for Tanio Koba-designed KJW M4 receivers. Features an adjustable plunger to calibrate engagement depth against the internal striker pin, ensuring complete valve depression. Fine-tune gasket height to form an airtight compression seal against the rubber piston face without causing bolt carrier drag.
Tokyo Marui MWS / VFC / WE-Tech / WA M4 GBBR Series NOT Compatible Third-party M4/AR-15 GBBR platforms utilize distinct valve knocker depths, different gas router seal profiles, and non-matching magazine catch heights incompatible with KJW's Tanio Koba engine architecture.

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: M4 AEG, VFC M4, KWA/KSC M4, GHK M4/MK18/G5, WE-Tech Open Bolt M4/M16/416/XM177/MK18/MSK/L85/SCAR-L, WA/WOC/GE/KA/Matrix/Inokatsu, SRC ZAROS SR4, G&G MGCR

Want to compare every option? Use the KJW M4 Adapter Builder.