They are the little engine that couldn't.

I absolutely love the idea of these things, a semi auto .44 mag carbine is sweet by definition. But there were reliability isssues, and by the time I got to shopping for one they were out of production and mags were scarce and pricy, so it was nyet.
But I swear to God, if Ruger were to make a mini-14 in .44 mag, make it accurate to within 2-3" at 100 yards and offer both a four and a thirty round mag, I would buy one tommorow if I had to hock the dog.

I would also reccomend one to every urban PD in the country as the .44 won't fly as far as a 5.56 and you'll only need to shoot someone once with a 240 grain round. I don't know why more companies haven't tried this as it seems like a money tree, as lots of folks interested in deer or hog hunting as well as SD would love a two gun Combo that included a mag fed SA carbine.