I can't post a link to this info because it is buried deep in Ruger's website and in drop down menus, but if you go to their Mini-14 page and click "order" on one of the Ranch Rifle minis, you'll find a new page for the one you are "ordering" and you can then click on "other variations" and the info will be revealed at last. A poor website design, I say.
But here's some info from the above:
5820: 16.12", no rings.
5828: 22" target, harmonic dampener
5846: ATI stock folder, 16.12", suppressor
5847-RUG: Tactical, rings, 20 round, suppressor, 16.12"
5848: Rings, tactical, 5 round, suppressor, 16.12"
5855-RUG: 18.5", 5 round, rings, blued w/black stock
The times, they have changed. Ruger offers a lot of different versions of the Mini-14. It looks to me like the big variable is the barrel length, with Ruger having responded to the market demand for an AR-length barrel. I personally want the 18.5" barrel, which doesn't add much weight, to get a little more out of the .223 caliber. The site also indicates a "sale" ending today, with several of these models "out of stock". We don't know if that means the distributors have them in stock and the factory is out of stock, and/or dealers have some or all of them in stock, etc. etc.