Brentwood, N.H. man purchases four military M67 fragmentation grenades with inoperable fuzes from undercover FBI agents. District court: To be a grenade, a device must contain not only explosive material but also a means of detonating that explosive material. Inoperable fuzes mean the man didn’t buy grenades. First Circuit: Reversed. The grenades were explosive; they just needed new fuzes. Congress can’t have meant for agents only to use fully functioning “weapons of war” in their sting operations.