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MR556A1 Upper Receiver Kit from HECKLER & KOCH

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MR556A1 Upper Receiver Kit Product Image
MR556A1 Upper Receiver Kit

from HECKLER & KOCH
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The MR556A1 Upper Receiver Kit allows high quality AR-style rifles to be retrofitted to HK's famous pusher rod operating system. An MR556A1 Upper...

Product • March 21st, 2012

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