This is the Heavy Duty version of the Mag Double. It is secured with a set of screws and bolts which lock it up tight around your magazines.

The Mag Double allows you to combine two magazines into one larger capacity magazine. It doesn’t just hold two magazines together for a faster reload, it actually allows you to feed two magazines worth of rounds from one magazine assembly.

Assembly is easy, you simply remove the baseplates from your magazines, and then the locking plates from the ends of the springs. Clip the two springs togeather with the included replacement locking plate, then lock the two magazines together with the Mag Double. Tighten down the front, and you’re ready to rock.