FX Impact transfer port

[TomDavies]

Hello...Can anyone tell me what the diameter of the transfer port is on the FX impact .22 smooth bore barrel?

 

[likkitysplyt]

As close as I can tell ... on my "smooth twist" barrel ... it is 4.31mm or .1695"

 

[Talleremotos]

Hola y el de el .30 ?