Real field rifles should have a backup sighting system. There just really isn’t a good reason to bot have well designed aperture sights on the gun, or stored in the gun- without an aiming device rifles are useless. Scopes do hard break, they do get iced/fogged up on the outside, pouring rain renders them functionally dead, etc, etc. As well, states are starting to limit seasons with irons only…
A couple of us are working on proper aperture setups for rifles. There were two other, backup style options there as well.
That bottom picture is a full on aperture setup, and works extremely well. In the field with a highly practiced and skilled person, if they can see it with their naked eye, they can hit it.
10 rounds, prone off a pack, rapid fire. The taped spots are getting it zeroed. So far that rifle/ammo and those sights are averaging 1.5 to 2 MOA for ten round groups.
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