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How to tell M60 Manufacture Dates by Trunion Markings


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Some valuable information that I wanted to share with the boards..... May be helpful to some of you guys with Saco Defense M60s........ The M60 started being manufactured in 1957. From 1957 until around 2000 they had specific markings on top of the trunion. If you have a Saco Defense M60 (or one built using a saco trunion) you can tell the approximate range for date or manufacture based on those markings. They are as follows:

 

1957 - 1962
Saco-Lowell Shops U.S.

 

1963 - 1979
SACO-Lowell New England Group (Division)
Maremont Corp. U.S.

 

1980 - 1984
Saco Defense Systems Division
Maremont Corp. U.S.

 

After 1984, SDSD became Saco Defense Inc., but still as a Maremont company. 

 

In 1998, the New Colt Holding Company (Colt) acquired Saco Defense Inc. from Maremont. 

 

In 2000, General Dynamics Armament Systems (General Dynamics) acquired Saco Defense Inc. from Colt. It subsequently became the Saco Defense Division of GDAS.

 

Some pictures below of various Saco Trunions we have here for reference

 

Aaron - Mohnton, Pa

Sales@BeltFeds.Com

 

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Edited by Aaron in Mohnton Pa
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Hey Aaron,

Great info!!!

WRT the 57-62 “Saco-Lowell Shops”. There appear to be two variants.  Those that start with (1) “Gun,Machine” and (2) those that start with “Machine Gun”.  Any idea for the years of each why the change?  Any similar info on the Springfields and T-161s?

Matt

Edited by mattnh
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@mattnh The ones marked "GUN, MACHINE" are the very earliest markings. They changed the type of Roll Dies they used not long after those I believe. I you look at the GUN, MACHINE VS MACHINE GUN you can see the roll marks are different as far as depth / width etc.... I don't have any information on the Springfield ones.... The T161s were GOV PROPERTY marked on the top of the trunion along with the T161 designator.....Doug Oefinger ( DLO) had like 18 amnesty registered T161s at one point.

Aaron

Edited by Aaron in Mohnton Pa
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  • 7 months later...

Just adding information to this being we got an email with questions on this topc this week.......... Factory Saco Defense M60D and M60e3 Machine Guns were marked as such on top of the trunion. 

   Photo below of a Factory M60D and M60e3 for reference..... Over the years some owners would stamp the "E3" next to M60 on the trunions of their guns after converting them to E3. Usually, it is easy to spot this due to spacing of the letters and inconsistency in letter detail.  

   With that being said, M60D and M60e3 Marked guns are extremely rare to come across. The M60e3 went into production and started being issued in 1985. So if you have a factory marked E3 gun it was made between 1985 and the ban in 1986. 

Aaron - Mohnton, Pa

 

M60D 

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M60e3... Note the Black barrel latch retaining cap. This is an easy way to tell if the gun is a factory e3. These black caps are unobtainable and from what I understand only ever sold on factory e3 guns. So this cap and a two hole case deflector behind the ejection port instead of 3 holes is what to look for when assessing if a transferable gun is a factory M60e3. 
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Edited by Aaron in Mohnton Pa
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  • 11 months later...

Adding some more trunion marking photos which I didn’t previously have:

- The rarest M60 trunion out there. M60C marked. Which is an aircraft mounted solenoid operated gun (Photos courtesy of my friends Dustin an Brennon)

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- Nice Maremont Corp marked M60D trunion.

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Edited by Aaron in Mohnton Pa
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  • 2 weeks later...

This is a NEAT one ….  A long time collector has this and contacted us for info on it.... This gun was made by Saco Defense for the South Korean Military... Which makes sense being Saco was the US Military supplier and the United States supplied South Korea with weapons after the Korean War.... I am unsure how this one made it into the registry....I believe it is possibly an amnesty registered gun... A FOIA was done on it but they redacted everything except the manufacturer and would not provide anything else.... Regardless, this is really neat and likely 1 of a kind.

Aaron - Mohnton, Pa

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Edited by Aaron in Mohnton Pa
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