Greg, I bought a wonderful used Garbi 2-bbl set 28 ga from CSA (Carolina Sporting Arms) a couple years ago. When I patterened it the firing pins were sticking in the primers making it hard to open. They offered me a full refund including shipping, or to fix it. I went with the latter; I sent it back, their gunsmith fixed it and they payed shipping both ways.
Joe Bernfeld