Abstract: This invention comprehends an improved flechette structure having means for urning back split forward portions thereof upon the striking of the target thereby to increase the wound capabilities of the flechette. The flechette structure includes a one-piece member defining both the penetrating nose portion and flight stabilizing fin portion of the flechette. The nose portion is split and a wedge element is disposed therein for effecting the turning back of the nose portion as a result of the striking of the target. The wedging element may further define at least a portion of the penetrating nose of the flechette.