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Discussion Starter #1
Does anyone know what the number engraved on the bolt of the MR-7 is? Probably a no brainier answer but I'm just not educated on it yet. Thanks in advance!
 

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Compare it to the rifle serial number. It may be a portion of the rifle serial.
 
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Ya should be ser# every rifle is Headspaced of bolt face and you cannot should not swap bolts so they put ser# on bolt so you cannot should not get them mixed up. Widow
 
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Bolts are often marked during the build process to keep critical fitting parts together. The marked number is usually part of the serial number-3 or 4 digits-- so that the bolt can follow the receiver through the assembly process. It is probably marked after ensuring that it fits, functions, and headspaces as intended in that particular receiver.
 
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Discussion Starter #6
Thanks everyone, that was it! The 3 numbers engraved in the bolt match the last 3 of the serial #.
 
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