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questions about factory marking on bolt


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Posted

hey i was just curious if anyone knew whos markings these were. i bought my ar from a local shop he had built it the night before i bought it. spike tactical lower i really dont know anything about the upper but today doing some cleaning i found the letters HP MP in gold.

bolt_zps01c2e776.jpg

thanks

Posted

If it's a BCM, and if it was bought as a complete carrier assembly, it should also have "BCM" on the right forward side of the carrier, visible through the ejection port when the port door is open. 

If it's just the bolt assembly, the carrier wouldn't necessarily be marked. 

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