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AR-15
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4 Products
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Heckler & Koch MR556 A4 5.56 NATO Complete Upper Receiver Kit - 11"
Heckler & Koch MR556 A4 5.56 NATO Complete Upper Receiver Kit - 16"
HK USA MR556 5.56 NATO Complete Upper Receiver - 16" with Geissele HK416 Super Modular M-LOK Handguard Combo
HK USA MR556 5.56 NATO Complete Upper Receiver - 11" with Geissele HK416 Super Modular M-LOK Handguard Combo
