Beads and apertures go together better than blades and apertures in my shooting experience.

If the rear face of the bead is a flat surface, ie: not having rounded corners, and it lays on about a 60 degree angle, it will catch and hold light making it the very best for shooting animals in the open or bush.

Blades like the sourdough can be good, but work better with V or U notch rear sights - which can disappear in deep shaded bush.

The bead front sight on this rifle is as described and picks up any available light, no matter how dim, and shines like a beacon. Due to the flat rear face, it doesn't produce errors in elevation and windage from light reflecting on the sides, as a rounded bead does.