Quote Originally Posted by Barryg View Post
Thanks for the info on the TP it does surprise me though I wonder why AA didn't take advantage of that nice setup to have a short TP.
The breech jaw/end plug and main cylinder need to be attached somehow, generally with the cylinder being female, and breech jaws/end plug being male. The length of TP can be dependent on what joining method is used (threaded/brazed etc).
Also the longer it is, the less effect machining tolerances will have on the angle of the barrel relative to the action.
Super short TP's are only really viable for sliding comp tube actions.

Hw80 (12mm?) Is probably the shortest you could reasonably go. But maybe the pro elite designer favoured a longer port for an alignment or joining reason?