LAR-9/BT9

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Rock River Arms

A4 Upper Receiver

A4 Upper Receiver LAR-9/BT9

LAR-9/9mm A4 Upper Receiver

PRi Gas Buster Charging Handle

PRi Gas Buster Charging Handle LAR-9/BT9

LAR-9/9mm PRi Gas Buster Charging Handle

Upper Conversion Parts

Upper Conversion Parts LAR-9/BT9

LAR-9/9mm Upper Receiver Conversion Parts