Griff, welcome again to the KCA. The one picture I see at your link looks like a nice rifle but we'd need to see more to give it a thorough evaluation. I saw those rifles for sale and don't believe the story either. It's sort of like a coin dealer selling a bag of wheat back pennies that are "unsearched". Sure.

But, you're right-you buy the gun, not the story. You probably have a great shooting rifle.

You can easily take the rear sight off the rifle without removing the hand guard by removing the two screws and lifting it off. It's easier to change the slide with the sight off the rifle first. If you have problems, let us know.

More pictures would be nice and show us the slide also.

Congrats on your new purchase!