Should have posted here.
www.airgunnation.com
Air Arms - FX liners in an AA S4/5xx
I got the final parts for my FX liner in an Air Arms experimental project. I had a breech end adapter made from brass for use on a FX liner. In the middle is the adapter on a FX liner. It duplicates the dimensions on a current model OEM barrel and transfer port as seen in the bottom image...
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