Take the CZ 75 TSO with the brand new optic mount and Trijicon RMR to the range today. First time with the optics. Put the dot on target, shoot and the slide locks back. Smack it and it goes back in to battery. OK maybe its the new mags. Does it again, and yet again. Worked flawless the other 2 outings. Slide wont go back in to battery. The only difference was the addition of the mount. As soon as I get home I start to take the mount off. Quarter turn on one of the mounting screws, and the slide snaps back. Lesson one: make sure the screws are the proper length as to not interfere with the slide. I used 2 of the original gas pedal screws (only needs 2), which were perfect, but the third one ( the mount uses all 3 holes) that came with the mount was about 1/8" to long. Removed the one screw, ran back to the range and put 100 flawless rounds through it. I'll take it apart to clean tomorrow. Keep your fingers crossed. Lesson two. So I go to use the red dot for the second trip to the range, and instead of the sharp dot it looks like paint splatter! Oh jeez, I'll bet I screwed it up trying to rack the slide. Just keep shooting. So go home see nothing in the manual. Tried it with my glasses off and the dots back?! I had cataract and corrective surgery in my shooting eye. So when I was at the range, I had clear eye protection on (script glasses off) to test my new eye out. At home it was bifocals on, so sure enough, took them off and there's the dot and the splatter is gone. Lesson three, I'm not as smart as I think I am. Anyone else have the red dot experience?