Delivery devices for an occlusive implant and method for making and using delivery devices are disclosed. An example delivery device may include a delivery sheath having a proximal region and a distal tip region. A reinforcing member may extend along the proximal region. The distal tip region may include a grooved distal section. The grooved distal section may be configured to shift between a delivery configuration and an expanded configuration. A core member may be slidably disposed within the delivery sheath. An occlusive implant may be releasably coupled to the core member.