Too, I wonder if the standing breech wears an APUN for the A&D Body Action, Belts & Braces?
I wouldn't say Francotte supplied or sourced the tubes, but Francotte was a major player on the world stage of sporting arms. What I would say is that G-R supplied the tubes that had been set back a decade earlier and maybe a few other parts, just short of a Gesteck(parts kit) & commissioned Francotte to cobble it all together for them. No doubt the sporting platform was assembled and pass thru the Liège Proof Facility, but the sporting platform is pretty much a continental version mainly under the French Speaking Mechanic Banner.
Serbus,
Raimey
rse