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Posted: 3/22/2011 7:00:04 PM EDT
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Ok, help me understand something here. Midway, Brownells, et al are filled to the brim with every possible height increment of dovetail front sight (I'm referring to 3/8" dovetail for a shotgun). How is it nobody has thought to produce a height adjustable one? I can only imagine how much of a pain it would be if ARs had a hundred different-height front posts!
Does a height adjustable dovetail front sight exist? |
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More complicated than it would be worth.
To change the front sight on sporting guns, the "standard" is to just replace the sight blade with a higher or lower blade. This is simple, not complicated, and doesn't give any problems like a more complicated adjustable sight would. There HAVE been a few adjustable front sights made, but these were expensive and usually used on very high end European type sporting rifles. These were pretty complicated designs in which the adjustment is in the sight base. Other than a pin-type front sight similar to the early AR-15 or the AK front sight which screws up and down, there's no good way to design an adjustable sight blade that wouldn't be pretty big and bulky. You could design a simple ramp base with a pin-type screwed in sight, but you'd also have to include sight protection "ears" to prevent the small pin from getting broken off easily. This would require replacing the entire front sight base, and since most shotgun front sight bases are high-temp brazed on the barrel, it'd be a major job to replace it, including refinishing the barrel since the brazing would ruin the finish. In short, there's just not enough demand for such a sight to make production economic. |
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I've been hesitating but...if you insist...
A blade front sight IS adjustable. One way. That's how it is done on muzzle-loaders. They come equipped with blades that are too tall (constantly shoot low), one simply files it down through trial and error (hopefully more trial and less error) to the desired elevation. Not the solution you are looking for, i know, but there it is. |
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The CZ 452 has a very well designed adjustable ramp front sight. It's not very complex and works very well to correct the elevation so the ladder rear sight can be "on" at the indicated yardages. However, most sporting rifles don't have a military rear sight calibrated for specific ranges and therefor don't need adjustable front sights.
You typically find adjustable front sights on rifles with range compensating rear sights where the rear range indicator is not adjustable. i.e. The M1 Garand front sight doesn't need to be adjustable since the rear elevation drum can be zeroed after the rifle is sighted in at a specific range. The AR15 front sight is adjustable since the rear elevation drum cannot be zeroed after sight in. Best view I could find of a CZ 452 front sight: 
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Quoted:
I've been hesitating but...if you insist... A blade front sight IS adjustable. One way. That's how it is done on muzzle-loaders. They come equipped with blades that are too tall (constantly shoot low), one simply files it down through trial and error (hopefully more trial and less error) to the desired elevation. Not the solution you are looking for, i know, but there it is. Heh, not really workable with a fiber optic :) |
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