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M1A NM, Oversized Stock, Why?

This is a discussion on M1A NM, Oversized Stock, Why? within the Stock forums, part of the Rifle Forum category; Originally Posted by KurtC The main reason for the oversized stock is threefold: 1. More wood to allow for bedding. 2. A sturdy forend to ...


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Old March 19th, 2016, 01:01 PM   #16
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Originally Posted by KurtC View Post
The main reason for the oversized stock is threefold:

1. More wood to allow for bedding.
2. A sturdy forend to control barrel vibration and whip.
3. Less flex when slinging up tight.
Not sure about #1, but I disagree on #2. Part of NM preparation is to float the barrel, by cutting out inside the stock, so it does not touch the barrel. You will never stop barrel vibration, but by letting it happen at natural resonance, it is predictable, so you can work loads to coincide with the harmonic. If the stock touches it, it is less predicatble, especially as the position of the stock changes with sling tension.

So I fully agree with #3. If you get your sling good and tight, you can flex the stock; a fatter fore end is a benefit.

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Old March 19th, 2016, 01:10 PM   #17
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Not sure about #1, but I disagree on #2.
I thought he was talking about draw pressure with #2. You'll never get a barrel to fully float with a gas system.

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Old March 19th, 2016, 01:46 PM   #18
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I think the idea is to add enough clearance so the stock has minimal or no interference with the barrel, so if you pull the stock tight with the sling, you do not risk changing the stock pressure on the barrel.

Yes, the gas system is still there, but it is constant. Stock pressure would vary with sling tension.

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Old March 19th, 2016, 03:59 PM   #19
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I thought he was talking about draw pressure with #2. You'll never get a barrel to fully float with a gas system.
Yes. You need a sturdy forend with proper draw pressure to pull down on a unitized gas system to dampen barrel vibration. A unitized gas system doesn't do much if the stock doesn't have a sturdy forend.

With service style rifles, one has to rely solely on sling pressure to pull the forend down against the lip on the band. If you have a medium weight stock, you can let it do much of the work for you.

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Old March 19th, 2016, 04:57 PM   #20
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Originally Posted by ShootingSight View Post
I think the idea is to add enough clearance so the stock has minimal or no interference with the barrel, so if you pull the stock tight with the sling, you do not risk changing the stock pressure on the barrel.

Yes, the gas system is still there, but it is constant. Stock pressure would vary with sling tension.
It does vary with sling tension. That's why you want the beefy stock (and a heavy bbl). The beefier stock is more rigid and will transfer less of the sling load onto the barrel.

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Old March 19th, 2016, 04:59 PM   #21
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Supermatch stock for anyone who's interested.


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Old March 31st, 2016, 02:49 PM   #22
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McMillan fiberglass competition stocks are slightly trimmer than the walnut Super Match stock and also slightly heavier. I like the feel of wood, but always used McMillan stocks on my personal competition guns. They simply are the best.

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Old March 31st, 2016, 03:04 PM   #23
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Back in the late 80s there were some M1A match stocks that looked like they were slightly whittled down railroad ties

The NRA eventually cracked down and published max stock dimensions in the Highpower rule book. The McMillian was legal under these dimensions.

There are probably still some of those railroad tie stocks out there so caveat emptor if you plan to compete in NRA or CMP events.

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Old March 31st, 2016, 07:23 PM   #24
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Extra weight and rigidity.

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Old April 11th, 2016, 09:24 AM   #25
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Hey 30Caliber, is that one of the leftover Fajen stocks? She is a beauty and I like the color you finished her with!

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Old August 18th, 2016, 07:36 PM   #26
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Nice I need one to get rid of the plastic Inc stock wood n steel very nice Fajen is it from Sadlak


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Old August 18th, 2016, 07:37 PM   #27
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New to this but not M1As hope to chat with 30 Cal


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Old August 18th, 2016, 07:47 PM   #28
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I have a loaded with Boyd's stock however I think op rod guide touches wood please advise if I should relieve this area like the black plastic stock it came with
Darn gun shop was to lazy to order me the walnut loaded so off went the plastic stock


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Old August 28th, 2016, 08:05 PM   #29
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SAI never made double lugged guns,I have seen 3 different dimensions on SAI rifles,the standard stock,then the NM stock which is like yours,a little beefier in the forearm around the pistol grip and back of heel and but stock areas,then the Supermatch,these are all in Walnut,then you also have the Mcmillan Fiberglass stock also used on the Supermatch.

I thought the SAI M25 Whitefeather rifles were double lugged. They are sweet rifles, but man are they expensive. I would like to shoot one some day, just to try it out.

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Old August 29th, 2016, 09:20 AM   #30
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I have a loaded with Boyd's stock however I think op rod guide touches wood please advise if I should relieve this area like the black plastic stock it came with
Darn gun shop was to lazy to order me the walnut loaded so off went the plastic stock


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Absolutely. But go slow when letting.

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