Autoinjector for dispensing a liquid product, in particular a drug, comprising: a) a housing and a product container arranged in the housing, in particular a syringe, which has a movable plunger, the plunger being movable in a dispensing direction in order to dispense the product contained in the product container, b) a propulsion element (7; 7') which acts on the plunger during product dispensing, and a first spring which acts on the propulsion element (7; 7'), c) a needle protection sleeve which, in order to trigger the product dispensing, is movable from its starting position relative to the housing and along a longitudinal axis of the autoinjector in the proximal direction, in particular by an actuating stroke (Hs), as a result of which a second spring is tensioned and in particular the product dispensing is triggered, the needle protection sleeve acting on the second spring, characterized in that d) the housing comprises a retaining portion, the retaining portion of the housing projecting in the distal direction beyond a distal end of the housing, and the retaining portion of the housing having one or more grooves or alternatively one or more rails which, in conjunction with a rail or rails provided on the needle protection sleeve or alternatively in conjunction with a groove or grooves provided on the needle protection sleeve, form an anti-rotation element between the housing and the needle protection sleeve, and e) the propulsion element (7; 7') has, on an inner side, an inwardly projecting rib (7c; 7c') or inwardly projecting ribs (7c; 7c') for adjusting a spring tension of the first spring, the length of the rib (7c; 7c') or the ribs (7c; 7c') determining a pretensioning of the first spring such that it can dispense the product from the product container by moving the propulsion element by a dispensing stroke (H A). a) a housing and a product container arranged in the housing, in particular a syringe, which has a movable plunger, the plunger being movable in a dispensing direction in order to dispense the product contained in the product container, b) a propulsion element (7; 7') which acts on the plunger during product dispensing, and a first spring which acts on the propulsion element (7; 7'), c) a needle protection sleeve which, in order to trigger the product dispensing, is movable from its starting position relative to the housing and along a longitudinal axis of the autoinjector in the proximal direction, in particular by an actuating stroke (Hs), as a result of which a second spring is tensioned and in particular the product dispensing is triggered, the needle protection sleeve acting on the second spring, characterized in that d) the housing comprises a retaining portion, the retaining portion of the housing projecting in the distal direction beyond a distal end of the housing, and the retaining portion of the housing having one or more grooves or alternatively one or more rails which, in conjunction with a rail or rails provided on the needle protection sleeve or alternatively in conjunction with a groove or grooves provided on the needle protection sleeve, form an anti-rotation element between the housing and the needle protection sleeve, and e) the propulsion element (7; 7') has, on an inner side, an inwardly projecting rib (7c; 7c') or inwardly projecting ribs (7c; 7c') for adjusting a spring tension of the first spring, the length of the rib (7c; 7c') or the ribs (7c; 7c') determining a pretensioning of the first spring such that it can dispense the product from the product container by moving the propulsion element by a dispensing stroke (H A).