The TAPP M4 Adapter lets your EMG FN 509 run standard AEG M4/M16 magazines: cheap, light and everywhere.
Spec card
| Type | M4 |
|---|---|
| Feeds from | Standard AEG M4/M16 mags |
| BB capacity | 30-250+ |
| Overall profile | Medium |
| Recommended mags | PTS EPM1 or similar high-power mid-cap |
| Best for | Competitive play |
Compatibility
| Brand / Platform | Compatibility Verification | Tuning & Adjustment Notes |
|---|---|---|
| EMG / Cybergun FN 509 Tactical GBB Series | Direct Native Fit | Direct OEM factory standard for the EMG / Cybergun FN 509 GBB platform. 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. |
| EMG FNX-45 / Tokyo Marui / WE-Tech / VFC Pistol Lines | NOT Compatible | Full-size FNX-45 platforms, standard G-series, and third-party pistol models utilize distinct magwell frame dimensions, non-matching valve striker heights, and proprietary gas router profiles incompatible with FN 509 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: TM FNX-45, VFC/Cybergun FNX-45, TM FN57
Want to compare every option? Use the EMG FN 509 Adapter Builder.
