Trumpet Archon free action trumpet and AoO

[nogoodscallywag]

A Trumpet archon is fighting a shadow angel.

The shadow angel is attempting a sunder on the trumpet of the archon.

The trumpet can be made into a greatsword with a free action.

The sunder attempt gives the archon an AoO. Does this mean the trumpet archon can free action his trumpet into a sword during the AoO?

[Nicos]

nogoodscallywag wrote:

A Trumpet archon is fighting a shadow angel.

The shadow angel is attempting a sunder on the trumpet of the archon.

The trumpet can be made into a greatsword with a free action.

The sunder attempt gives the archon an AoO. Does this mean the trumpet archon can free action his trumpet into a sword during the AoO?

Technically No. You can only use free action on your turn.