The Venom Bavaria has synthetic piston and breech seal installed, I have never shot one to be able to comment on improved characteristics, I would be interested in a PTFE conversion it was .22 only though.
Jim
Whatever happened to 'David Jenkins' from WBPS who did conversions on the Anschutz 335 (and Mauradermax) are WBPS still trading ? I have not seen any mention of them for years.