I'm looking to try installing a flat bottom firing pin stop on my Kimber stainless target II and I see two different ones at midway. There is the Wilson Bulletproof Square Bottom Series 70 and then a few by EGW that are oversized and some say they are Series 70 and one says Series 80. Which one is appropriate for the Kimber stainless target II with adjustable sights?
Also, if any are a drop in fit that would be preferable, as I'm no gunsmith, and there aren't any trustworthy gunsmiths in my town, I have to mail it off to someone or drive a long way. If I have to attempt handfitting, what abrasive tool should I use? A file?