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🎖USAF Retired
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Discussion Starter · #23 ·

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I always looked at it as the odometer rolling over.

It doesn't look like there were any 660s, but I know my M18 does not have an A, but my Bravo (bought over a year later) does have an A after M18.

I've got 5 365s: two 365s, a 365X and two 365XLs and three have 66B SNs and the other two are NRAs.
 

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I thought the same thing. I double checked. I know, it seems backwards! 😎
In the middle of this reply I looked again. The born on dates and S/N don’t seem to add up.
View attachment 478148
The S/N and date don't make sense. My P365X is S/N 66B924542 and was made November 12, 2021. I have to believe Sig made more than 1,356 P365's (all variants) between 10/21 and 07/22. Strange.
 

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Since the FCU is the serialized part, could it be that the FCUs are randomly drawn from a pool of previously made units as needed? This would make the exact variant of pistol model and date of manufacture irrelevant.
 

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P938 Legion, P365SAS , P320X Compact, P226
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My 365 SAS is 66A
 

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I remembered seeing a guy start a post about one difference he found in models around the year you've mentioned. I wonder if this has something to do with some of the alphabets representing this change. He I do recall said his early model had a better feeling trigger.
 
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