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m1a barrel markings----NM

This is a discussion on m1a barrel markings----NM within the The M14 forums, part of the M14 M1A Forum category; i have an m1a ser#111xx with a barrel with nm stamped on the barrel behind the front sight in the place where i have seen ...


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Old March 20th, 2010, 06:19 PM   #1
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m1a barrel markings----NM

i have an m1a ser#111xx with a barrel with nm stamped on the barrel behind the front sight in the place where i have seen tham all marked. it is a standard weight barrel and doesn't seem to be chrome lined. there are no other markings on the barrel at all. the rifle is accurate to beat all heck. my question is what barrel could it be? the person that sold it had it in his closet for 15 plus years.
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Old March 20th, 2010, 08:27 PM   #2
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Yes, the original NM barrels are of the standard profile and not chrome lined. TRW,SA,SAK made NM barrels. Canadian Arsionals(sp) of Long Branch made NM M-14 barrels under Us Gov contract and are marked with CA and then there #.

Look under the op-rod area or sometimes you will need to remove the handguard as there maked on the underside and there covered over.

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Old March 21st, 2010, 02:00 AM   #3
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no markings at all but NM--

i already had the action out of the stock and removed the hand guard and there are no markings at all on the barrel except NM behind the front sight.
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Old March 21st, 2010, 03:14 AM   #4
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It is a Wilson Arms barrel blank machined at Hillside Manufacturing (Dallas, PA) in 1979. In 2004, I interviewed the gentleman that machined your barrel. It was an extremely interesting interview. At one point in the conversation, he matter-of-factly described, in wonderful detail, how he machined the M1A barrels. He described the machining operation like he had worked on your barrel earlier that day. I wish I could give him credit but he wishes to remain anonymous. You have a keeper.

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Old March 21st, 2010, 10:41 AM   #5
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Well, this is all new news to me, I'm really glad I ran across this thread. Let me ask about mine. It's a 6,9xx serial number, and other than the NM there are no markings. Could mine be a Wilson too? I believe mine was born around 9 or 10 of 77. I called Springfield when I bought it and was told that it left them as a NM that year.

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Old March 21st, 2010, 10:54 AM   #6
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Quote:
Originally Posted by jcb View Post
Well, this is all new news to me, I'm really glad I ran across this thread. Let me ask about mine. It's a 6,9xx serial number, and other than the NM there are no markings. Could mine be a Wilson too? I believe mine was born around 9 or 10 of 77. I called Springfield when I bought it and was told that it left them as a NM that year.
Same-o, same-o, if it's a standard contour barrel with NM and no other markings on a rifle from the late 1970s to about 1986.

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Old March 21st, 2010, 12:49 PM   #7
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Smile How to tell

One thing that is a sure sign that the barrel is commercially made will be the number of grooves. Springfield's barrels are 6 groove with the exception of those built with Krieger heavy match barrels.

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Old March 21st, 2010, 03:23 PM   #8
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Mine was new in '78. The barrel has a NM stamped on it (looks like it was stamped by hand rather than by a machine). It says "Geneseo, IL" on the bottom of the barrel. It has 6 lands/grooves and I believe I remember reading it was 1 turn in 11 inches but I haven't really checked it (or it I did it was many years ago and I don't remember.)

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Old March 22nd, 2010, 01:56 AM   #9
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thanks for the info different-

thanks for the answer and the effort on all above.
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Old March 22nd, 2010, 06:24 AM   #10
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Quote:
Originally Posted by Different View Post
It is a Wilson Arms barrel blank machined at Hillside Manufacturing (Dallas, PA) in 1979. In 2004, I interviewed the gentleman that machined your barrel. It was an extremely interesting interview. At one point in the conversation, he matter-of-factly described, in wonderful detail, how he machined the M1A barrels. He described the machining operation like he had worked on your barrel earlier that day. I wish I could give him credit but he wishes to remain anonymous. You have a keeper.
Do you happen to know if these barrels were button rifled or broach cut?

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Old March 22nd, 2010, 08:45 AM   #11
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Wilson Arms barrels are button rifled.

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Old March 22nd, 2010, 07:11 PM   #12
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what is the rate of twist?????

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Wilson Arms barrels are button rifled.
-
what is the rate of twist of the wilson arms barrels?
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Old March 23rd, 2010, 08:51 PM   #13
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1:11 for 18 " and 16.25 " barrels

Wilson Arms has supplied 22 " barrels in 1:10, 1:11 and 1:12 rate of twist over the years. Example, Wilson Arms supplied Springfield Armory, Inc. with a 1:11 ROT 22 " six groove medium weight barrel blank for the loaded standard model M1A.

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Old March 24th, 2010, 02:11 AM   #14
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thanks,

thanks diff.
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Old April 12th, 2010, 08:50 PM   #15
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I just picked up a 31,*** ser# std that has no NM markings and no other markings anywhere that I see but is marked Geneseo ILL on the bottom of bbl. I guess I may have the same non chromed bbl but not a NM ???
I suppose that would be a factory built gun also..? Was thinking it may have been sold as a bare receiver with a no name bbl.

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