I hadn't realised that you could get a removable, refillable, air tube for the PT.
The only ones I've seen to date have been the fixed variety.
Shows what I know.
L/H Pro-Target MK111 Burris Timberline 4.5-14x32 Ballistic Plex
L/H TX200HC Burris Fulfield II 3-9x40
L/H TX200 GinB
Why is dyslexia so difficult to smell?.