Online dealer. Never heard of him. He has what I want but I don’t know anything about them. Any experience with him?

Are you talking about www.22mods4all.com ? I bought a 9mm upper from them, shipping took fooooooreeeeeeeeeeeevvvvvaaaaaaarrrrrrrrrrr, but the price couldn't be beat. So if you got a budget, and time isn't a concern, it'll be fine, but if you need your stuff by tomorrow, you best keep looking.