we have this adapter for converting 1/2-36 to 5/8-24, you could use that with a 5/8 muzzle device on your 1/2-36 barrel.
which kak product did you have in mind? asking because we have some KAK-like mini krinkovs/flashcans in my new products pile.
Any plans for an M18x1RH to 5/8”-24 or M18x1RH to 1/2”-28 thread adapters?