The PS/31 PS31 Zmag Adapter. This 3D printed adapter allows one to use Zmags in the 31 series of Lage Mfg. upper receivers. It is made of a carbon fiber polycarbonate blend with a steel paddle magazine release and magazine release pin. It is made to be inserted into the upper and then allow for ease of use with standard Shockwave Zmags.
Note: Please be sure to watch the second video below if you are using brand new Zmags in the adapter. It demonstrates how to profile the magazine feed lips to work properly with the upper.