The 146's all have open iron sights. The rear is on a boss and easily filed if you wish, to a shallow V as I did. The front is a bead insert(from the front) as on most Euro rifles. The sights are usually closely 'on' at 100 meters with factory 286gr. ammo.

My .46's sights were dead on at 50 meters with my 270gr handloads and an inch or so high at 100meters.
9.3x57 M46 Husky 270gr. Speer @ 2,300fps - range 200 yards -lasered.

Finger points to the entrance into the cavity of the bullet after smashing the on-side leg. The moose was standing on a little hill crest, chest higher than his butt, so the bullet had to climb through the cavity, which it did, stopping in the meat between ribs, just under the spine. At the time, I wasn't very happy with the performance, but have since changed my mind about it.