Mini14 factory mag or not?

[fatelk]

I found an old magazine today, a couple of them actually, and bought them cheap. The old Mini14 hasn't come out of the closet for a long time, and I have a factory 20rnd mag for it, but these looked like good quality.

Once I got home and peeled the ancient duct tape off of them, I saw Ruger stamped on the side, and they have an unusual floor plate. Apart from some minor rust, they look good.

Are these an old style of Ruger magazine, or a copy? Any ideas?

The one on the left is a factory one I've had for years.

 

[1KPerDay]

They're both ruger IMO. they made 2 different styles of mag catch/whatever it's called. I have both types myself. the new ones I got from ruger recently have the type pictured on the left.