Howa makes rifles to order for outfits like Weatherby, to the customers specification. They've been doing this for a long time.
If you take a close look at the pricey Nosler rifle line for example, you will get a good clue as to where the actions are manufactured.
My favorite Howa-made rifle by far is the Webley & Scott "Empire" rifle, marketed through Legacy Sports. The metal finish is nice, the Walnut stock is excellent, and I like the flush-fitting detachable steel magazine. The price is good too, for what you get. - Slightly less than a Deluxe Vanguard.
I'd take a pass on the scope and mount that they offer in the package deal though, and just order the rifle. Remington mounts work on this action.