Thank you for your photo. I assume you're referring to the marks on your frame rails? If so, rest easy. Our pistols are cycled approximately 2,000+ times during the building process; this cycling replicates how hard the slide reciprocates when shooting live ammunition and this all is for insuring that each pistol is consistent in quality and ready to go out of the box. This cycling is why all pistols show such wear marks out of the box, and it means your CZ is built right, and ready to run. I hope this helps explain to you why this is there, and brings you comfort.
Let us know if you have any further questions or concerns.
Thanks,
Dereck Miller
Sales Assistant
800-955-4486 x 334
fax: 913-321-2251
CZ-USA