OG Rattler Barrel Options

I’ve got an OG Rattler 300BO and am looking to get a 6.75” barrel.

What are my options?

Any aftermarket possibilities out there?

I see Craddock sells a 6.5” but what would I need to make it actually work?

I’m new at this and slightly stupid but please feel free to be as condescending as you wish as long as you are specific in what I need to do or why I’m fucked.

Thanks!