Thanks, those are the links I was looking for.
I was looking to take a long, pinned 10rd S&W magazine, knock the pin out then insert this restrictor. Before inserting the restrictor I wanted to cut it down to make it into a 15rd restrictor since that's the magazine limitation in NJ.
The restrictor looks like its made with 5rd increments. So I was going to cut the last 5rd segment to make it a 15rd restrictor. I thought this would be the most effective way to make 15rd mags for NJ. Thoughts?
Do you think this restrictor would work on a ProMag magazine? Would this idea be legal for NJ?