I found a Yildiz over/under 26 inch barrel , it came from the factory already threaded for chokes , I got William at Sumtoy Customs that build my chokes 384 for the top barrel and 387 for the bottom , shooting Tss... it weight around 5 pounds ... I would go over/under ... that way you can switch between your barrels , that's what i do... 384 up close and 387 further out ....