Injection-molded devices and systems for graft or other tissue delivery, methods for their single-use in delivery of an implant, and kits for their sterile delivery to a practitioner are disclosed herein. Systems for implant delivery comprise an injection moldable implant body and an insertion device comprising: an inner and outer shaft that form a locking mechanism that secures an implant body in place and releases it upon placement within a patient. Systems are configured to be manufactured by injection molding, such that they can be cost-effectively manufactured and discarded after a single use to avoid costs and risks associated with re-sterilization and cleaning, but can in some cases optionally also be manufactured by machining to be re-sterilized and reused.