Now I'm really confused about the type III mag catch pictured on your S'G', is that the one you swapped out for the type IIa “B-IP” marked one you bought?
In my case if I'd have paid a bit more attention to War Baby! I could have avoided the hassle (i.e. whining, begging, spending $) of obtaining & now selling what I thought was the correct "IP-A" safety. I'm learning that War Baby! doesn't necessarily spell out everything that is right for a particular carbine, one sometimes has to put 2+2 together themselves.
I'll stick a pic of my safety with my others on my earlier post.