BudsGunShop.com - will this work on mossberg 500 flex

Cameron, no this will not fit. The mossberg 500 flex doesn't take detachable magazines. It has a fixed tubular magazine. Hope this helps

Cameron, you did ask about the 590 Flex, correct? Not the 590M. This will not work on a Mossberg Flex. The Flex uses a tubular magazine and will not accept any detachable magazines or drums. Btw, it will not work in the 590M either.

Cameron, no Sir. The Mossberg 590M only takes the proprietary Mossberg Detachable Magazines - mossberg.com/new-590m-mag-fed-pump-action/