Well, got my hands on an SKS-KD, (Love this rifle) and was finally able to see if the sevensixtwo mag release fits and would possibly hold the magazine in place. Ran into a few snags though.
Here's the trigger group as it comes out of the rifle
<a href="http://s480.photobucket.com/user/theoneofthechuck/media/sks-kd/20170109_083335.jpg.html" target="_blank"><img src="http://i480.photobucket.com/albums/rr165/theoneofthechuck/sks-kd/20170109_083335.jpg" border="0" alt=" photo 20170109_083335.jpg"/></a>
Trigger group with the sevensixtwo mag release side by side (yes I got camera happy sorry)
<a href="http://s480.photobucket.com/user/theoneofthechuck/media/sks-kd/20170109_083341.jpg.html" target="_blank"><img src="http://i480.photobucket.com/albums/rr165/theoneofthechuck/sks-kd/20170109_083341.jpg" border="0" alt=" photo 20170109_083341.jpg"/></a>
with the mag release "installed"
<a href="http://s480.photobucket.com/user/theoneofthechuck/media/sks-kd/20170109_084710.jpg.html" target="_blank"><img src="http://i480.photobucket.com/albums/rr165/theoneofthechuck/sks-kd/20170109_084710.jpg" border="0" alt=" photo 20170109_084710.jpg"/></a>
<a href="http://s480.photobucket.com/user/theoneofthechuck/media/sks-kd/20170109_084701.jpg.html" target="_blank"><img src="http://i480.photobucket.com/albums/rr165/theoneofthechuck/sks-kd/20170109_084701.jpg" border="0" alt=" photo 20170109_084701.jpg"/></a>
And two pics of the release that comes with it installed
<a href="http://s480.photobucket.com/user/theoneofthechuck/media/sks-kd/20170109_084832.jpg.html" target="_blank"><img src="http://i480.photobucket.com/albums/rr165/theoneofthechuck/sks-kd/20170109_084832.jpg" border="0" alt=" photo 20170109_084832.jpg"/></a>
<a href="http://s480.photobucket.com/user/theoneofthechuck/media/sks-kd/20170109_084818.jpg.html" target="_blank"><img src="http://i480.photobucket.com/albums/rr165/theoneofthechuck/sks-kd/20170109_084818.jpg" border="0" alt=" photo 20170109_084818.jpg"/></a>
Now, the biggest problem that I found is that it looks to have a modified or custom spring. The ends micd at approximately 5.89mm and 5.63mm. The hole in the mag release micd at 5.23mm or 5.32mm I can't remember. Will show it in the pics to follow but the spring looks a little out of shape, leading to the messed up numbers. Might see if I can find another spring to replace it with and see if that works.
<a href="http://s480.photobucket.com/user/theoneofthechuck/media/sks-kd/20170109_084135.jpg.html" target="_blank"><img src="http://i480.photobucket.com/albums/rr165/theoneofthechuck/sks-kd/20170109_084135.jpg" border="0" alt=" photo 20170109_084135.jpg"/></a>
<a href="http://s480.photobucket.com/user/theoneofthechuck/media/sks-kd/20170109_084124.jpg.html" target="_blank"><img src="http://i480.photobucket.com/albums/rr165/theoneofthechuck/sks-kd/20170109_084124.jpg" border="0" alt=" photo 20170109_084124.jpg"/></a>
<a href="http://s480.photobucket.com/user/theoneofthechuck/media/sks-kd/20170109_084153.jpg.html" target="_blank"><img src="http://i480.photobucket.com/albums/rr165/theoneofthechuck/sks-kd/20170109_084153.jpg" border="0" alt=" photo 20170109_084153.jpg"/></a>
<a href="http://s480.photobucket.com/user/theoneofthechuck/media/sks-kd/20170109_084201.jpg.html" target="_blank"><img src="http://i480.photobucket.com/albums/rr165/theoneofthechuck/sks-kd/20170109_084201.jpg" border="0" alt=" photo 20170109_084201.jpg"/></a>
will see if I can find a replacement spring, but in the meantime I shall reinstall the mag release and when I go back home give an update as to whether the mags properly lock in or not ^.^
Hope this helps