I am looking at getting a P320 like the one picture below but was wondering if there is a model that comes with a threaded barrel and if the Romeo 1 is any good?
More info on the Romeo 1 is appreciated. Thanks

There isnt' an RX model with a threaded barrel. The Romeo 1 is still kind of too new to have a "yes it's good", "no it's trash" rating yet. 

If you get the compact RX you can buy a SIG factory threaded barrel for it.

No one makes a threaded barrel for the full size...yet.

I have the RX full size. So far I like the Romeo. Glass is very clear. Nice variable brightness settings. I like the auto off feature. When you pick it up the dot is right back on, from the motion. Holding zero well. 

Cant tell you a thing about its long term durability though. I've just had it since December and have only shot it on the indoor range. No even moderate use, much less hard use. 

But I'm pleased so far. I'd be surprised if it developed any issues but also don't want to overstate it, because my short time with it. 

Im looking for the same gun Op is. Hopefully they offer it.....someday.

Given the way P320s are selling I suspect a year from now there will be oodles of aftermarket products. Unfortunately, it'll be a year.

I think the only threaded barrel models are the TACOPS Carry models.