I just finished installing a Mojo sight on one of my Swedes. I love the sight picture I get with the standard front sight but I'll know more when I get to the range. The sight seems to be well made from quality materials. Elevation adjustment is very smooth. The windage adjustment requires an allen wrench. I've got one on order for one of my K31s. If the weather tomorrow is as nice as it is today I may go to the range.