Tinkers Construct Lshuriken. It is a stackable item that can be picked up again so long as it doesnt hit a mob much like vanilla arrows. The shuriken is a weapon that was added with the latest beta version of tinkers’ construct, along with other weapons such as the throwing knife.
Shurikens are crafted using four shuriken blades in a tool forge. Tinkers' construct is a mod about putting tools together in a wide variety of ways, then modifying them until they turn into something else. Tinkers' construct is a mod originally created by mdiyo and progwml6, now maintained by boni and knightminer.