I like the hoods to avoid sun glare. That does affect my point of aim substantially. Some sights, like Lyman 17s do not remove and are intended to be used that way. The one above may be similar, though it is hard to tell. I would not want to be shooting more than 100 yds with irons if the front sight is uncovered, hence, I put one on my "bean field" percussion muzzleloader and on all of by bpcr hunting rifles.

Brent

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BrentD, (Professor - just for Stan)
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