The rear sight may, of course be filed to zero.

The quintessential rear sight on one of these things is the original HVA jaktdiopter, semi-Ghost-Ring type peep sight.

I have one on my 46, shown below. Maybe try Tradex and see if they have any?

Nothing beats a 5 1/2 pound 9.3x57 for chaing our scrawny bruins up the mountain!