I have a Ruger GP100 that I purchased several years ago. It came with the orginal box and had an extra set of stocks in the box. The extra stocks look like regular full sized rubber stocks with the wood insert, but they are two pieces instead of the one piece that is on my WC GP100. The one piece stock is below. What is the pin that fits in the area with the blue circle.
The two piece stock is pictured below:
The pin doesn't seem to do anything.
The stocks are basically the same size. I am going to order a set of the compact stocks.