Campo

Gee whiz, I really have a problem with this. Removing and installing a new dove tail sight is not the hard. Granted the new dove tail might be a little bit larger than the old or even a little bit larger than the existing dove tail. But you don't just drive it in. It only takes a few stokes from a file to do the nessary work to install the sight.There is a jig to screw the sight in with pressure. If he did not have that jig he would have to drive it in, but that can be done without marring the barrel or the sight. There is no reason for wear and tear because of sight installation.

Is this individual the owner manager of the gun shop. If he isn't talk to the owner. If he is I believe a frank discussion is on order and at least a compromise on some sort of compensation. Installing the system is not adequate compensation, 2 screws and a dove tail sight. Did he return your old parts to you? What does the old dove tail look like?

Another option is to get the barrel fixed - it can be done, but it will not be free - someone is going to have to pay.

It is terrible to have a new gun damaged.

I really wish you the best of luck.