Get an ss-25 stock class feed tube from wevo
and install it youreslf.
It requires some drilling and tapping on the body , and you will need to remove your stock feed neck. Hopefully its a threaded feed neck then you can trade back and forth between stock class feed , and open class.
Its a little more work if the feed neck is pressed in , and once its done theres no going back.
Thats what I did on my gun. It was a pressed feed neck. I have another that has a threaded feed , so I will be doing it soon. Then I will probably sell what I have now.