Mark,You are lucky you were able to find a replacement for your 634. The 63x series has not been imported for quite a while. The 631 was not imported even longer ago than the 634.See if you can find yourself a 631. It is the low power version of the 634. When they were imported (several years ago), they were known as the poor man's R7, accurate and easy to shoot.The only thing that bugs me about the Slavia 63x series (besides not being imported into the US) is that they have a non-standard 14mm sight rail. So you need to get a special scope mount, and the red-dots with integral 22RF rails end up being offset from the centerline of the barrel. I think they were designed to use a Slavia diopter sight, not a scope, so it did not matter to them that the sight rail was a non-standard width.