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How do I know it's really TRW?

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Old May 3rd, 2020, 11:32 AM   #16
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Dog fight... what dog fight?
I don't expect everyone to agree with my personal opinions and I'm sure I am not always right all the time. I'm sure Ren will tell me what he disagrees with. If I feel he makes a good point I may change my thoughts on the subject.

I am aware, by the way, that TRW rear sight bases do have an identifying feature. I can't remember exactly what it is, but I seem to recall it has something to do with the outside contour of the rear bottom edge where it meets the ears of the base.

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Old May 3rd, 2020, 11:54 AM   #17
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In my experience, I have found that due to TRW manufacturing methods, the rear sight base has somewhat rounded edges rather than sharp and square edges as do all other rear sight bases. Look at the central channel where the aperture rides and you will see what I am referring to. On non-TRW bases this channel has sharp and square edges, but on a TRW base these edges slope very slightly inward before coming to an edge. This is an absolutely non-scientific way to determine the authenticity of a TRW base but I have found it be be accurate for me. Others may have other methods they utilize.

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Old May 3rd, 2020, 11:56 AM   #18
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Quote:
Originally Posted by Ted Brown View Post
Dog fight... what dog fight?
I don't expect everyone to agree with my personal opinions and I'm sure I am not always right all the time. I'm sure Ren will tell me what he disagrees with. If I feel he makes a good point I may change my thoughts on the subject.

I am aware, by the way, that TRW rear sight bases do have an identifying feature. I can't remember exactly what it is, but I seem to recall it has something to do with the outside contour of the rear bottom edge where it meets the ears of the base.
Ren posted the pics below a while ago and I keep them for reference. I added some arrows and dots to show the contour or the rear bottom edge.

The sight on the left was identified as TRW [it is not marked in anyway] buy you can clearly see that the contour is wider and flatter versus a standard rear sight. You can also see the distance from the bottom of the base to the bottom of the countour is longer vs. a standard sight since the overall contour is flatter.

Hope this helps... M1Army


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Old May 3rd, 2020, 01:46 PM   #19
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With weaponry, TRW's claim to fame is in their ability to forge steel products. They were proud of this and marked the parts accordingly. Namely, the receiver, bolt, barrel, operating rod, trigger housing and hammer. In the same manner, true Winchester parts will have 66118 on them.

That leads us to believe that there is a distinction between parts made by TRW and those used by TRW. The windage and elevation knobs are perfect examples. Conglomerates like TRW and Olin Mathieson
had the ability to subcontract just about anything. Look at the parts marked OM, the parent corporation, instead of 66118, the Winchester subsidiary. The big four often shared subcontractors, as well.

Fortunately for the avid (or rabid) collector, the rear sight base with the contoured recess has only been found on original M14's that were made by TRW. Without seeing original documentation, I wouldn't try to guess who actually made them. Perhaps Lee has seen such.

If the contour is the result of a forging operation, I think the TRW would have marked the base. If it is the result of a poor casting or a milling step that was left out, I can see why a marking was left off.

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Old May 3rd, 2020, 01:51 PM   #20
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Quote:
Originally Posted by KurtC View Post
With weaponry, TRW's claim to fame is in their ability to forge steel products. They were proud of this and marked the parts accordingly. Namely, the receiver, bolt, barrel, operating rod, trigger housing and hammer. In the same manner, true Winchester parts will have 66118 on them.

That leads us to believe that there is a distinction between parts made by TRW and those used by TRW. The windage and elevation knobs are perfect examples. Conglomerates like TRW and Olin Mathieson
had the ability to subcontract just about anything. Look at the parts marked OM, the parent corporation, instead of 66118, the Winchester subsidiary. The big four often shared subcontractors, as well.

Fortunately for the avid (or rabid) collector, the rear sight base with the contoured recess has only been found on original M14's that were made by TRW. Without seeing original documentation, I wouldn't try to guess who actually made them. Perhaps Lee has seen such.

If the contour is the result of a forging operation, I think the TRW would have marked the base. If it is the result of a poor casting or a milling step that was left out, I can see why a marking was left off.
No Lee has not seen such, and in fact it is a part TRW manufactured themselves.
TRW forged their flash suppressor but did not mark it, forged their gas cylinder but did not mark it. Sometimes ya just have to go with the evidence. Unless it can be found, TRW rear sight blue prints, this is the logical next step.
REN

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Old May 3rd, 2020, 06:30 PM   #21
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This picture was taken from 1964 Fort Jackson BT manual all TRW rifles which are throughout the entire book . The old thread on this was in photobucket .Quite possible the entire top surface is forged to final shape as you cannot see any machine marks like on the other makers.




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Old May 3rd, 2020, 09:35 PM   #22
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Quote:
Originally Posted by IRON WORKER View Post
This picture was taken from 1964 Fort Jackson BT manual all TRW rifles which are throughout the entire book . The old thread on this was in photobucket .Quite possible the entire top surface is forged to final shape as you cannot see any machine marks like on the other makers.



I was under the impression it was a cast part.

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Old May 4th, 2020, 02:56 AM   #23
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Sight base differentiation.

TRW



H&R



OM-N


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Old May 4th, 2020, 08:50 AM   #24
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Quote:
Originally Posted by XM25Ren View Post
I was under the impression it was a cast part.

REN
I really don't know,but everything else they did went through coining dies very close to final shape.The rear sight base would have a good choice for that too.

If in strong sunlight you should be able to see difference between cast or raw die forged surface.

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Old May 12th, 2020, 12:03 PM   #25
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Quote:
Originally Posted by nf1e View Post
Sight base differentiation.

TRW



H&R



OM-N Art, you better look again, it will be OM B2 or OM B3 but you will not find the letter,"N".

Hope this helps.

REN

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Old May 12th, 2020, 02:00 PM   #26
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[QUOTE=XM25Ren;4527512]Hope this helps.


I will defer to your expertise on the bottom of a part. I knew it was Olin and that was about it from memory.

Of coarse you were right Ren, I was thinking to the trigger group on that build.


Last edited by nf1e; May 24th, 2020 at 02:06 AM.
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Old May 23rd, 2020, 06:38 PM   #27
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Had TRW pistons back in 66 in my 327 Chevy. 1955 BelAir 4 speed C Modified Production.

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Old May 24th, 2020, 02:07 AM   #28
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Quote:
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Had TRW pistons back in 66 in my 327 Chevy. 1955 BelAir 4 speed C Modified Production.
Any problem keeping that avatar car from falling off the pavement?

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Old May 24th, 2020, 05:58 AM   #29
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Quote:
Originally Posted by XM25Ren View Post
I was under the impression it was a cast part.

REN
Judging from the pictures, it looks cast.

The index line is not cut, and this feature could not easily be forged. Also, there is little or no draft angle on the ears, which would be required in a forging to get it free of the die.

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Old May 24th, 2020, 06:48 PM   #30
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Quote:
Originally Posted by XM25Ren View Post
This is so untrue.
REN
Come on Ren , you know the correct way to ID a TRW rear sight base, your the one who posted that info to this site. Take the time to educate others.

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