here in a carbine
belgian double barrel 9 mm pinfire( 20 chambers in the cylinder) revolver carbine

https://www.hermann-historica.de/de/zwan...mp;currentpos=9

another double barrel revolver carbine

11 mm pinfire (9 chambers in the cylinder) and a 14 mm muzzleloader shotgun barrel
belgian made LeMat revolver carbine

https://www.hermann-historica.de/de/stif...p;currentpos=10