The flechettes were packed in a plastic cup with granulated white polyethylene to maintain alignment with the bore axis .
The flechettes were supported by a metal disk to prevent penetration of the over-powder wad during acceleration down the bore .
The flechettes were packed in a plastic cup with granulated white polyethylene to maintain alignment with the bore axis , and supported by a metal disk to prevent penetration of the over-powder wad during acceleration down the bore .