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View Full Version : Will the HK 416 upper work with a MR556A1 lower ?


ralfabco
06-19-17, 18:41
Will the HK 416 factory built upper work with a MR556A1 semi-auto lower ? Any required mods ?
leibermuster
06-19-17, 19:54
Will the HK 416 factory built upper work with a MR556A1 semi-auto lower ? Any required mods ?

Yes. Yes it will.


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