Skip to main content
M55116 to APX
M55116 to APX
M55116 to APX
M55116 to APX

M55116 to APX

$122.00
6-Pin Adapter

M55116 to Motorola APX
6-Pin NATO → GCAI (M9) Adapter

Bridge your mil-spec 6-pin NATO PTT to Motorola APX-series radios via the GCAI accessory connector. Available in Dynamic or Electret variants.

Signal Chain

Headset → Downlead → 6-Pin NATO PTT → This Adapter → Motorola APX

PTT Side

Input connector (from your PTT):

U-329/U (M55116 6-Pin NATO Female)

Radio Side

Output connector (to your radio):

Motorola GCAI / M9 (6-Pin Hirose)

Dynamic vs. Electret — Which Variant?

⚡ Dynamic (Amped)

~150Ω dynamic microphone — requires amplification circuit in the adapter

Headsets: Peltor COMTAC, Ops-Core AMP, MSA Sordin MIL, OTTO NoizeBarrier, Earmor M31/M32

🔌 Electret

~2kΩ electret microphone — no amplification needed

Headsets: 3M Peltor LiteCom, commercial/LE electret headsets

⚠ Wrong impedance = no transmit audio. Dynamic mics on an electret adapter produce barely audible or silent transmissions. When in doubt, choose Dynamic — most tactical headsets are dynamic.

Compatible Radios (M9 / GCAI)

  • APX Series (8000, 7000, 6000, 4000, 1000, 900)
  • XPR Series (6550, 7550, 7580e)
  • SRX 2200 (Combat Radio)

1-Year Warranty | Designed & Manufactured by DISCO32

Buy American Act Compliant

You may also like