Mec Gar was the OEM manufacturer for 5906 magazines. The ones marketed under the Mec Gar name are identical to the S&W magazines except for the markings.
They work perfectly in my 5906.
Originally Posted by KG7IL
Try the Mec Gar...
The 17 round mags are Mec Gar's patented method of adding two rounds to a standard magazine.
I like their quality... I haven't had any problems.
You will note that they also have a longer 20 round... I any 20 rounder is going to work, it would be this one..
Try one out and let us know !