Yep, they work but IMO picatinny rails are best when used with picatinny ONLY rings. You get more contact area between rings and rail. Now if you got something like the Warnes 2 piece bases its not an issue. Talley makes a few 2 piece picatinny bases. Not many but i sure would love a set for Knights. That would be super cool if they made them for round top Knights. They look lower than most rails and would make ring selection a tad better.