I ordered this adapter from Squad drop.
Squad Drop Hi Point Optics Rail accessory https://a.co/d/4v9fMSm
It's ok a bit loose in fit there's a slight movement left to right very minimal. You can only get one screw in to it because of how long the rear sight chanel is on the JXP. I contacted high point and they said they would be adding an adapter to their website for sale. it's not out yet. When that arrives I'll probably pick it up to replace this one. I really wanted to finish what I had in mind so I went ahead with this purchase I think it was only 20 bucks?