Cylinder head has a rigid rectilinear displacement lock for automatic weapon outer drive.

A control cylinder (10) comprises determining a Keyless rebounds of the cylinder head and requiring little space two cams of equal thickness (40, 41) mounted to one behind the other and 180degre offset relative to each other, which rotate continuously in the same direction with the control cylinder (10). To move the bolt locks (37, 38) mounted on each side of the yoke (9) is arranged a respective slider (42, 43) between an axis (47) of the slide cylinder and the control cylinder (10 ). Each slider (42, 43) surrounds a cam (40, 41) U-shaped and transmits the transverse movement of the cam to an associated locking bolt (37, 38) for locking and unlocking by locking manner to the yoke (9).