In addition to my addiction to the R51, I also have another addiction as well......M1 Garands. As an avid collector of the M1 rifle, I am always intrigued by the lowest and highest serial numbers of each make made, and those in between. So now it is starting to carry over to the R51. I have a Huntsville stamped frame made in July of this year serial number 20614. My question is, what is an approximate serial number when frames started getting stamped Huntsville, and when Charlotte frames end? I know this may seem a bit crazy, but I just can't help but be curious since I think I have been inflicted with the terminal illness R51itis.

First one, 361xx
Second one, 346xx
Third one, Well, we don't know yet, do we?

The second one must have lain on a shelf a bit, yeah?
Both Charlotte of course.

Interesting, mine has a 20,000 serial number and was stamped Huntsville. Yours are later and they are stamped Charlotte. Maybe they found some extra stock of existing frames to finish? Or, keeping in mind that technically Charlotte frames are actually Gen 1 guns, they were part of original production, and they started over with serial number 1 at the beginning of Gen 2 production at Huntsville? I would think however, that they would simply have picked up where Gen 1 production left serial number wise. This is interesting indeed.

Mine is 109XX  from Charlotte.
Another interesting question.   Are the Smokeys on a different serial number run?
Mine is H023XXX, Assuming the H is for Huntsville.
Do any of the black R51s from Huntsville have an H in front of the serial number?
Blackie

Yes Blackie. Mine is Huntsville and it has a H prefix to the serial. That would be interesting to find out about the Smokeys and if they are on the same run or not?
UPDATE:  However, I think we have a trend going.....so far two Smokies with 23xxx serial numbers.

On mine the number is 0025086R51 and the frame is stamped Charlotte NC.

Highest serial number Charlotte so far. Like I said previously, mine is a AL gun and its serial is 20614. Also, answers a previous question that Blackie had, and that yours is missing the H prefix to the serial number, meaning that it must be specific to Huntsville. I wonder if Remington started over in a previous serial number block with the new production frames, and are working back up. If so, this could make for something interesting to look for.........duplicate serial numbers. Wouldn't it be cool to have a Charlotte and a Huntsville with the same serial number. 

Charlotte 0015xxxR51

Rocky has just confirmed my suspicions. It looks like Remington started production fresh in Huntsville with a new serial number block.....probably starting at or below 3,000. Rocky, you have 3,xxx and to date is the LOWEST serial number on any R51 I have found. Gen 1 production in Charlotte reaching (thereabout) the highest serial number I have seen to date (36,1xx). With such a low serial number, this must mean Remington started completely fresh in Alabama. Also, something else to keep our eyes open for, there seems to be a trend with Smoke frames in the 23,xxx range. So far, I have seen two on this forum that have 23,xxx serial's, and one on display in a local shop with a 23,xxx serial number. Will the trend continue, or will it break at some point? Time will tell. Thanks for posting guys!

R51Fan,
     My serial number is H023102R51 on my Smokey!   I see no reason to hide the last
three numbers,   If my gun gets stolen, I will still  have the number to give the
police.
Blackie

There have been instances of fraudulent sellers on gun auction sites using serial numbers and photos harvested from sites such as this.  I doubt that it is common but it has happened and that would be one reason to not share the complete serial number.

Peace favor your sword,
Kirk

My Serial number is H009677R51 mfg. March 2017.