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· Premium Member
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247 Posts
Discussion Starter · #1 ·
I bought a MP5 barrel that was advertised as factory. I have never seen these markings. It appears to have a cartouche at the base of the barrel and then just says HK K520. It has 16 flutes. Any ideas, confirming it is German?

Thanks


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· The Librarian
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5,477 Posts
The K520 is the manufacture's lot number. There was a period of time where HK maintained quality control using lot numbers when production was at an all-time high for the MP5. You'll always see an "HK" proceeding the lot number.
 
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