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Front Sight Theory

This is a discussion on Front Sight Theory within the The M14 forums, part of the M14 M1A Forum category; The NM front sight is thinner than the standard by some amount, but the tip is still a rectangular block. Why does no one seem ...


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Old May 14th, 2020, 12:02 PM   #1
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Front Sight Theory

The NM front sight is thinner than the standard by some amount, but the tip is still a rectangular block. Why does no one seem to file/shape the front sight to a narrower point? Wouldn't that be even better?

Got bored and drew it up in CAD (it's CAD for printed circuit boards, so it's a little rudimentary compared to SolidWorks...)
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File Type: png frontsight.PNG (18.9 KB, 18 views)

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Old May 14th, 2020, 12:36 PM   #2
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The NM sight was developed to visually appear as the same width of NRA targets, which are close to 6 MOA diameter at each distance.

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Old May 14th, 2020, 12:40 PM   #3
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Narrow is better in theory, but will be less accurate when the ability to focus is compromised by a thinner blade.

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Old May 14th, 2020, 12:58 PM   #4
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Quote:
Originally Posted by smoothy8500 View Post
The NM sight was developed to visually appear as the same width of NRA targets, which are close to 6 MOA diameter at each distance.
That's cool to know, . . . thank you.

May God bless,
Dwight

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Old May 14th, 2020, 01:31 PM   #5
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Using 26.75 inches sight radius (info gleaned from this forum) an M14 front sight whose width matched the 6MOA of NRA/CMP targets would be .047 inches.

A .062 inch wide front sight is about 8MOA, slightly wider than the target black.

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Old May 14th, 2020, 01:36 PM   #6
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The wider sight is perfect for the black target width. I can’t shoot my M1917 very well yet due to the very tiny front sight. I would probably do terrible with an M1A pointed sight.

Worth a try though, would love for someone to post some results. I’d file down an SAI sight, but not a GI.

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Old May 14th, 2020, 03:42 PM   #7
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The pointed sight post would DQ your rifle in a service rifle match.

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Old May 14th, 2020, 04:05 PM   #8
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The back of the blade on the NM front sight is squared and rectangular as noted. This is meant to give the operator a crisp sight picture. The blade tappers to the front so the sight picture won't show the sides of the blade when adjusted for wind. That would result in a false sight picture and screw up the sight adjustments. Some shooters prefer the standard wider blade at shorter ranges. The reason is that the narrow blade tends to follow the curve of the bulls eye when favoring left or right in changing wind conditions. It causes shots to impact high. Most shooters don't have that problem and get along with the narrow blade just fine. Shooters who use a frame hold for 600 yard and longer ranges sometimes prefer the wide blade.

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Old May 14th, 2020, 04:54 PM   #9
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Ted, Smoothy, thanks. I've been educated-again!

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Old May 14th, 2020, 05:43 PM   #10
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The older I get, the wider the sight gets.

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Old May 14th, 2020, 05:53 PM   #11
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Originally Posted by Louis1332 View Post
The older I get, the wider the sight gets.
Same here, I now have two front sights.

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Old May 14th, 2020, 06:44 PM   #12
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I've always lined up the sight with the target frame at the 600. Can't do that with a narrow sight...

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Old May 14th, 2020, 08:27 PM   #13
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Quote:
Originally Posted by Louis1332 View Post
The older I get, the wider the sight gets.
Quote:
Originally Posted by mb3 View Post
Same here, I now have two front sights.
The last build I went too a .072 front and added a lens in the hood, much less eye fatigue.

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Old May 14th, 2020, 08:29 PM   #14
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it is very difficult(read impossible) to get the black bull to sit right in the tip of a pointed front sight. you end up sticking the point into the bull. the square front sight allows you to place the bull right on top of the sight. hold too high and you no longer have a circle resting on the sight. Hold too low and you see a gap between the sight and bull.
Better is a aperture front sight where you eye puts the bull in the center of the front sight and centers the front sight inside the rear peep sight. But that puts you in the match rifle class.
I actually made a front sight for my M1A where i epoxied(JB weld so it was really solid(:>) an aperture ring to the the back of the front sight blade. Worked really well for old eyes.

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Old May 15th, 2020, 07:34 AM   #15
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Even with the years on me I can see the front sight. But there's just to many of them.

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