Quote Originally Posted by evert View Post

Tracker port: 2.6mm
Osprey port: 4.1mm
Hi Evert

This may be of use to you :-

http://www.airgunbbs.com/showthread....ht=Webley+hawk


As the hawk is the same bore and stroke as the Osprey the information could help you, I found a 2.5mm transfer port to work well on the Hawk.

What length is the transfer port on the Osprey as that needs taking into account when sleeving down ?



All the best Mick