Last night after firing 100 rds through the .40 I have determined that I need new rear sights. I believe the rear set is too close together, and the main cause of my eyes to become blurry. I fired a friends Kimber and the rear sights are wide and I had no problem after firing a few shots. I plan on doing competition Action Pistol with this gun, and I need something easier on my eyes. Are their any bolt-in rear sights for our guns, or do I need to drill these out and install the optic ones?