Home / Products / Heckler & Koch / Heckler & Koch MR556 A4 Complete AR-15 Upper Receiver - 5.56 - 11"
Heckler & Koch MR556 A4 Complete AR-15 Upper Receiver - 5.56 - 11"
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$1,999.99
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$1,999.99
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Sep 8, 2026
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Heckler & Koch MR556 A4 Complete AR-15 Upper Receiver - 5.56 - 11"