**One modification is needed**
**M4x4 lock bolts -Optional**

These are custom adaptorts to be able to swith between headband and arc helmet attachment.
The std headband connection utlizes a full wraped stealrod around the pin on the ear cup.
By adding these you are now able to swap beween Headband, Arc rod styl as in pic's and Arc pin clic in place.
The rod holes are tight to hold in place, but I still added lock bolts M4x4. If you use them on a helmet its better to really make them fixed as you usally push them back over the helmet.

Two options for modification:
1. Bend open. Risk for damaging the cup but a “quicker” way. Well they are pretty hards to bend open.
2. Open up the cup and loosen the lockring from the inside. Little bit fiddly and you need to move the electronics aside as well.
I choose option no2.

Good Hunting