A grip accessory 300 for a manual injection device. Grip-accessory 300 comprises a hollow bodied housing 310 for supporting a manual injection device. Housing 310 comprises an intermediate portion 340 extending between a distal portion 220 and a proximal portion 320. Distal portion 330 has a first opening 335 into which a manual injection device is insertable. Proximal portion 320 comprises: a second opening 360 through which a needle of the manual injection device is extendable； and a skin contacting surface 367 at a proximal end of the accessory 300. Housing 310 further comprises a guide means 670,fig.7 on an interior surface of distal portion 330 for guiding a plunger rod 270 of an injection device. Also a manual injection device comprising: a syringe housing； a moveable shield biased to extend over a needle； a releasable lock that locks the shield in a retracted position and when unlocked allows shield movement to its extended position； a plunger 270 for delivering a dose of medicament, the plunger comprising an actuation surface 275 at its distal end for moving it； and an unlatching element 280 proximal of the actuation surface 275 to unlock the releasable lock.
