Marv has come to agree with me that the 6" barrel is better looking.
Magazines for pre-71 Ruger standards are very rare. He bought two new ones that are convertible between the Mk I and Mk II. They don't feed because they don't present the round high enough for the slide.
When we took the pictures comparing our purchases his is loaded with one of those magazines. After we took the last pic he snagged my gun and said, "Cool, were done!" I replied that he'd left me the gun with bullets in it. "So what, those magazines don't work!" Bastard!