. "5.6"^^ . . . . . . "The H&R SPIW is a prototype assault rifle designed for Project NIBLICK."@en . "Open-chamber"@en . "The H&R SPIW is a prototype assault rifle designed for Project NIBLICK."@en . "1951"^^ . "20"^^ . . "H&R SPIW"@en . "11.0"^^ . . "United States of America"@en . "2400"^^ . "David Dardick"@en . .