Ditto what Joe said.
But on the other hand, what you have there is a standard metric dovetail. If it were me, I would enlarge the dovetails on the barrel for one reason. If you should ever want to change sights again and get a sight set the is standard 3/8" dovetail, you won't have to repeat the procedure. File it once and be done with it.
I think the metric is about .360" and the standard is .375. There is not a lot of filing to be done on the barrel.
John (Bigsmoke)