a clip for use with a gas - operated gun to package and supply to the gun hygienic projectiles for inoculating animals with a particular biologically active material . the clip contains a molded structure having a plurality of axially aligned adjacent cylindrical chambers receiving the implant projectile and each chamber is sealed by a rupturable sealing film at each end thereof . indexing recesses are provided on said structure and associated with each of the chambers for indexing the clip in the gun to dispose seriatim the chambers in alignment with the bore of the gun .