I don't own a Rami but I do currently own 8 CZ pistols, the first, a CZ-75C purchased in 1993.
All but one (CZ-82) were purchased new.
In my experience, the looks of the insides of these (when new) were all over the map.
Concerning your pistol compared to the most similar (re: unused) of those I own:
The slide rail "wear" on your Rami looks to be MUCH less than that on the Shadow-2 I purchased 1/28/2018 and have not as yet had an opportunity to fire. I am certain no one but the factory would have fired this pistol (it was purchased locally).
The barrel "wear" looks to be on par with that of my P-07 9mm barrel which has only had a snap cap cycled through it a few times. The pistol has only been fired with the .22 conversion (i.e. The 9mm barrel is unused - pistol purchased locally).
Your pictures don't clearly indicate the wear points due to usage that I would look for (horizontal line on back of hammer from hitting frame on recoil, wear on the leading edge of hammer from slide dragging across it, wear at the base of the firing pin stop. wear on the tips of the trigger bar and the trigger safety plunger as well as the corresponding contact points on the bottom of the slide rails.
I definitely understand your concerns as I have been screwed over the years on Sig, S&W and Colt pistols (due to quality issues) but do not let yourself get wrapped around the axle over what essentially appears to amount to some interior finish issues.
Your costs to return it (if possible) would likely outweigh any actual benefits other than to ease your mind that you MAY have gotten a pistol that had been fired by someone other than the factory prior to you owning it.
IMO:
Does the pistol function 100%?
Is it accurate (considering size)?
If yes to all of the above, I would not lose any sleep over it.
If no, document your concerns and have CZ USA look at it.
BTW I have also noted your posts in the Sig forum but hesitated on commenting there.
Well, it's one thing to buy a gun locally, which presumedly, you're going to inspect and know what you're getting into before you purchase. But I wouldn't put it past some LGS to take the liberty of firing a custom pistol like a Shadow II themselves just for the hell of it before they put it on the shelf to sell as "new" (or some jack-legged seller with a slick website on gun broker to do the same). Have seen it happen, and sad to say it's probably a common occurrence.
Of course, when you're looking at a gun in a LGS, you're not committed and can just walk away. When you special order a gun, it's a different situation, you are at least somewhat committed, having already paid for it, along with S&H. At that point, if it were me, and the "new" gun had obviously been monkeyed with, I would send it right back for a refund (and probably never use that distributor again). That's why it's important to deal with established, reputable distributors with a no questions asked inspection and return policy. In the age of inter webs, companies live and die on their reputation and customer service. Unfortunately, if you don't call some on their bluff and keep them on their toes, it just encourages them to rip off others -- and to me that's a rip off because they've put mileage on a gun that you've paid for with the understanding that it's brand spanking new.
To me, it's that same as if you'd ordered a new car and it came to you at the dealer with a bunch more miles than you'd been told and with a bunch of trash and cigarette butts in the interior. That just wouldn't fly.
