I used to own a PII and the rear blade was loose out of the box when I got it! I had heard stories of the Kimber sights and Baer sights breaking. If I kept the gun I was going to replace the sights with Bo-Mars. They should fit in the PII cut and they are tried and proven. They are perhaps the most durable adjustable sights on the market. My first Baer was an old Concept III that actually came with Bo-Mars that had a rounded edge rear blade. Bo-Mar offers these sights in all black and night sight versions.