Not entirely, but they are better. If you can get one of the new "tactical ones" or recent GBs, those are better yet. The 580 series circa 2006 that I have is said to have been improved upon still further.

There's also a funky looking one with a muzzle device that can "dialed in" that is said to do 1 MOA.

Ruger does now sell 20 AND 30 rd factory mags to the public, BTW.

Improvements to the 580 series are a heavier barrel, repositioned front site, and a nicely fitted rubber recoil pad. Plus there's no longer a ranch or non ranch, they're all coming with provision for a scope and better rear sights.

You can put an Amega rail on, add a flash hider, or bed your gun, or else cut the barrel down to 11.5 or 12" and add a perm. attached flash hider to bring it back up past non SBR length to try to improve accuracy.

I've had four Mini 14s, still have one, my 580 series.

Of course I've have six ARs, and still have five with possibly two more on the way. Read into that what you fill.