Flechette rounds, left to right: XM645 with glass polyester sabot, XM645 with compressed sabot, XM110 with GP sabot, 10gr SPIW flechette and sabot above, XM144 with GP sabot, 10gr SPIW flechette above, .330 Amron Aerojet triple flechette, 9.53x76mmR Winchester quadruple flechette, AAI 5.56x45mm ACR flechette, Steyr 5.56x45mm ACR plastic cased telescoped flechette.