Abstract: Provided herein is a subassembly for a drug delivery device, including a housing defining an interior, the housing including at least one opening therethrough, a plunger rod having a proximal end and a distal end, a drive member received in the housing interior and configured to displace the plunger rod distally, a plunger rod follower having a proximal end and a distal end, the distal end of the plunger rod follower configured to couple with the proximal end of the plunger rod, and an indicator having one or more resiliently-biased arms having a protrusion thereon, wherein the protrusion is configured to be received at least partially within the opening in the housing following activation of the drug delivery device.

Abstract: The shell is intended to receive an injection system comprising a syringe received in a safety device which has: a body receiving the syringe; a shield movable relative to the body, for covering a needle; finger flanges extending outwardly. The shell comprises a tubular housing receiving a distal portion of the safety device and a casing receiving the finger flange, and further comprising: several snap features which flex outwardly during insertion of the finger flange in the casing, the finger flange being inserted distally from a distal face of the snap feature in the mounted position; and a protrusion located distally from each distal face, which exerts an inward biasing force on the finger flange in the mounted position.