Originally Posted by
T 20
The first British built Magnum springer of the 1970s, the Webley Vulcan, had a 2.5mm transfer port.
I've used 2.5mm ports on a number of guns without problems.
as you know I'm not saying it doesn't work, just that it's not optimal...
Always looking for any cheap, interesting, knackered "project" guns. Thanks, JB.