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Adjusting/Replacing the Front Sight on M1 w/ range rpt

This is a discussion on Adjusting/Replacing the Front Sight on M1 w/ range rpt within the M1 Garand Accuracy forums, part of the Rifle Forum category; I don't have a gas cylinder handy but I think you could take another front sight that has been cut down to clear the ears ...


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Old November 22nd, 2016, 04:44 PM   #16
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I don't have a gas cylinder handy but I think you could take another front sight that has been cut down to clear the ears on the sight you are moving and clamp it on the dovetail and use a feeler gauge to set it how much you want to move the sight. then loosen the FS and slide it over to touch the cut down sight and lock it down.
does that make since, I haven't had much sleep!

Casey

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Old November 22nd, 2016, 05:12 PM   #17
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Originally Posted by Earthquake View Post
I don't have a gas cylinder handy but I think you could take another front sight that has been cut down to clear the ears on the sight you are moving and clamp it on the dovetail and use a feeler gauge to set it how much you want to move the sight. then loosen the FS and slide it over to touch the cut down sight and lock it down.
does that make since, I haven't had much sleep!

Casey
That is a good idea. I would get a flat piece of bar and use the feeler guage like you describe. I see if my guages are low enough too. I did re zero so I'm good for now. 2 clicks at 200 isn't bad and the fronts pretty close to centered so I'll leave it until I think I need the NM. I forgot my M1A had a NM width front sight. If I remembered that when buying this replacement I'dve got the thinner one but I'll survive.

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Old November 22nd, 2016, 05:54 PM   #18
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You guys are making moving the front sight much, much harder than it is.

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Old November 22nd, 2016, 06:02 PM   #19
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You guys are making moving the front sight much, much harder than it is.
No kidding. Scribe a pencil mark and use the your non-calibrated Mk-1 thumb to move it 1.0 hairs at a time.

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Old November 22nd, 2016, 07:06 PM   #20
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I agree with Jay. If a front sight that is 36" away from the shooters eye is moved .01", then POI would be 1" at 100 yards Of course most shooters' eye is closer than 36" :)

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Old November 22nd, 2016, 07:57 PM   #21
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To elaborate, the M1A front sight moves the strike of the round 1" @ 100yds for .008in of sight movement in the standard model. It worked like clockwork and it was easy to measure due to the extra space on the mount it sits on with a micrometer.

The M1 didn't have as much space to measure relative and the .004in was about a hair wide so it was easy enough to eyeball the one time I did it before locking it down. So it was easier and a little less formal than for the M1A.

And the front doesn't have to center up perfectly anyway as you are just trying to get it close so you can rely on the rear sight for your settings that you will manipulate on a regular basis.

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Old November 23rd, 2016, 11:09 PM   #22
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You guys are making moving the front sight much, much harder than it is.
I've had to do it under pressure. At the Oklahoma games my front sight fell off when I uncased my rifle on the line. Feverishly I went down the line begging for an Allen wrench and one of the CMP staff shooting had one. As I installed it, my buddy said, "Use your sighters very carefully." I was lucky enough to get it fairly close to right and dialed in on the two sighters. Whew!

BTW, competing is fun!

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Old November 23rd, 2016, 11:41 PM   #23
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Reminds me of a High Power Sporting Rifle match I attended once. I was using a scoped Ruger 77 with floorplate button inside the trigger guard, and after the first two rounds, reloaded the mag and promptly hit the mag button and dumped all my rounds into my pant cuffs on the rapid sit stage! Snagged them up as quickly as I could, put them back in and finished the string on time. Won the match too!

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