Yes you missed the terms and admit it but the reason that it matters at all is that the gun was not as listed, described or even a close example of it. You asked all the right questions and expected the seller to answer them honestly and correctly. If is not the buyers fault is he is given wrong information to legit questions he asked to decide what he is willing to pay for a gun.
If the gun was the wrong gauge, the defects hidden by tricks of camera angle, the barrels three inches shorter than those listed in the description would you fail to return it? No. You got a gun not in condition as described, that was not the weight reported, that had barrels refinished and not listed in the description as such. When you see crappy pictures of barrels or engraving you need to suspect more than camera error. Why accept this gun? Your complaints are not trivial, not frivolous, not even that minor.
In the end you have to decide how much a difference it makes. Are these items wrong with it worth 200 dollars or 500 dollars? If 200 I'd eat it and move on. If 500 or more I'd contact the credit and take action. But understand that you will never enjoy this gun if you think you got screwed in the transaction. Every time you look at it you will remember what happened. A couple hundred bucks you can get over but 500-1000 is not going to go away and will you ever get your money back out of it?
