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Possible Devine M1A

This is a discussion on Possible Devine M1A within the Devine M1A forums, part of the M14 M1A Forum category; Please post more images of ORG extension. Thank you....


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Old February 13th, 2015, 12:15 PM   #16
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Please post more images of ORG extension. Thank you.

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Old February 13th, 2015, 04:54 PM   #17
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Here are some more pics. I talked to Mr. Balance today and he said it sounded like a match armorer installed it too keep the op rod guide from "turning" as some would do.
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File Type: jpg _DSC5115.jpg (16.7 KB, 16 views)
File Type: jpg _DSC5114.jpg (13.3 KB, 16 views)
File Type: jpg _DSC5110.jpg (21.8 KB, 18 views)
File Type: jpg _DSC5113.jpg (14.5 KB, 13 views)

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Old February 13th, 2015, 05:23 PM   #18
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It appears it is meant to make the op rod run more precise.

Edit: Guess I should have read your post instead of just looking at the pics.

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Old February 13th, 2015, 07:47 PM   #19
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Obviously Elmer hadn't seen it before either, since he is making an educated guess. The problem I have with it is that the op rod guide is installed very precisely on NM rifles by 1.) knurling the boss on the barrel then 2.) a press/hammer fit of the guide to barrel and 3.) a roll pin is installed in the hole in guide which slides into a corresponding slot on the underside of the barrel. Properly done it is a virtual impossiblity for the guide to turn. That is straight out of the AMTU manual on accurizing the M14. The M14 was an issue weapon when I served in the '60's and I never heard of that problem. So I would think this is an ideal solution to a non-existent problem as long as the guide is installed properly. In this case the entire assembly is made of aluminum, including the guide itself and it may be one piece but it doesn't appear to be. Aluminum would have a far greater opportunity to turn than steel on a knurled barrel boss - being softer and more pliable. That may be why no one, so far, has indicated they've seen this modification before. Having said that however, if the armorer who did it, didn't have the appropriate tool to knurl the barrel boss properly, this may have been a good solution at the time. In that case, I would expect that we would see it again in the future as more rifles come to light.

These photos illustrate the knurling and assembly I mentioned. The first is a near new M21 barrel that is medium heavy and you will notice the knurling under the edge of the rod guide. The second is a SAK NM barrel that is a take off and you can see the remains of the knurling and the groove that the roll pin goes into once the guide is installed.




Last edited by flintsghost; February 13th, 2015 at 10:04 PM. Reason: add photo's
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Old February 14th, 2015, 08:46 PM   #20
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Don't know if you can tell but it looks like this gun has the straight groove knurling. I was trying to get that in that first picture but I didn't get close enough.

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Old February 15th, 2015, 01:27 PM   #21
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I believe this operating rod guide sleeve/extension was an AMTU experimental item. The AMTU experimented with operating rod guide sleeves, gas cylinders, operating rod spring guides and operating rods. The rifle may have been rebuilt/reconditioned by an AMTU trained armorer after it left Texas.

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Old March 7th, 2015, 08:23 PM   #22
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Quote:
Originally Posted by gunnut75 View Post
Picked up serial number 001404 today. It is hand stamped under the barrel RT 1 BX 210 DEVINE TX . Its a two line address and theres no O in BOX. Top of barrel has a NM. All parts are military with an HR trigger group. Barrel is SA 7791362 9 63 SD 13. OP Rod 7267064 66118. Bolt is 7790186 TRW ZG. Op rod support, sleeve,hand guard and stock are all stamped 1404. The stock is cutout on the right side of the receiver with glass bedding fill all around the receiver area. It has all NM marked rear sights and a 595 peep. Is this a legitimate Devine andf is it common to be missing the O in box? I'll post pics soon.
Good Day, If it is not original then we both have a terrific FRAUD FORT DEVINE.
I have its brother Serial number 001405. I just checked all the numbers you described and they are TWINS! To answer your question about the O mine is missing also. I purchased mine in the 70's. If you don't mind me asking how much were they selling it for.

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Old March 8th, 2015, 12:16 AM   #23
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oprod guide

Interesting regarding the oprod guide "sleeve"....
Wonder if it helps...if it's clearanced the same....
Logic seems sound for smoother op rod operation..

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Old March 9th, 2015, 12:16 PM   #24
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Originally Posted by Kivaari View Post
Interesting regarding the oprod guide "sleeve"....
Wonder if it helps...if it's clearanced the same....
Logic seems sound for smoother op rod operation..
There are very few secrets among the top match armorers and they share constantly just like shooters do. If the sleeve had really improved things noticeably, everyone would have started doing it. Service rifle was very competitive when these guns were being used. They aren't seen very often on the lines of matches any more. My guess is that it was an idea someone had that after the experiment was tried, it turned out to be not much of an improvement, so others didn't follow suit.

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