Steyr Hunting 5 Auto with moderator

I recently shot a friend's Steyr Hunting 5 semi-automatic .22 cal rifle, and fell in love with it. It has a Neil Clague moderator on it. I've seen several pictures on the forum of other Hunting 5's that have moderators. If I order a new Hunting 5 from the distributor, it will not have 1/2" UNF threads to accept a suppressor.

My question is for those who have purchased this model and have a moderator: what did you do to install the moderator?