US 88032807 A description as illustrated in fig1 and 2 the present invention provides a flechette cartridge 1 comprising a cartridge case 3 having a base 5 and cartridge case body 7 a primer cavity 9 is disposed through said base 5 the cartridge case 3 is comprised of a cartridge case body 9 having an outer circumference 11 adjacent the base 5 and an inner circumference 13 opposite the outer circumference 11 the inner circumference 13 defines a smooth bored cartridge barrel 15 the smooth bored barrel 15 having an open mouth 17 disposed at one end thereof a primer 19 is disposed with the primer cavity 9 and high pressure chamber 21 is disposed adjacent the primer cavity 9 a low pressure chamber 23 is disposed adjacent the high pressure chamber 21 a propellant charge 25 is disposed within the high pressure chamber 21 when fired the weapon firing pin strikes the primer 19 and the primer 19 ignites subsequently igniting the propellant charge 25 a sub caliber payload cup 27 is disposed within the smooth bored cartridge barrel 15 adjacent the low pressure chamber 23 alternatively a single propellant chamber can be used wherein the propellant is ignited and propels the payload cup down the barrel venting at the muzzle the sub caliber payload cup 27 is comprised of a flechette retaining means 29 for retaining flechettes and for sealing propellant case within the cartridge barrel and a plurality of flechettes 31 retained therein the flechette retaining means 29 is generally formed of a plastic or composite material but may be formed of a metallic material and has a.