An autoinjection housing device includes a housing for receiving a dose cassette, a base latch configured to hold the dose cassette within the housing, and a back plate operably connected to a spring. The back plate is configured to move proximally within the housing upon receipt of the dose cassette into the housing, and the proximal movement of the back plate compresses the spring. The autoinjection housing device further includes an actuator operably connected to the base latch. The actuator is configured to move the base latch and the dose cassette proximally within the housing after the dose cassette is secured in the housing. The base latch is configured to move radially outwards upon said proximal movement of the base latch within the housing. The radial movement of the base latch is configured to cause the dose cassette to become unsecured within the housing. In response to the dose cassette becoming unsecured, the spring decompresses, causing the back plate to move distally and push the dose cassette out of a distal end of the housing.