I see Westrifle has gone back to a conventional rivet method. Probably for the best. The internal pin was prone to feeding issues in some instances.
Here's Westrifle's new rivet method. Very discreet.
Here's Westrifles earlier "metal block pinned to follower pivot point" method. This later evolved into a smaller piece of round bar stock.
Here's weimajack's rivet method. Also very clean, and flat.
Here's the oh so lovely "frankenpin" method. Thankfully no longer done.
Here's my favourite method, small bar stock welded to follower arm, employed on the early 2008 IZH imports.