Panzer I it still performed much useful service against entrenched infantry and other "soft" targets, which were unable to respond even against thin armor, and who were highly vulnerable to machine gun fire. The small, vulnerable light tank, along with its somewhat more powerful successor the Panzer II, would soon be surpassed as a front-line armoured combat vehicle by more powerful German tanks, such as the Panzer III, and later the Panzer IV, Panzer V, and Panzer VI; nevertheless, the Panzer I's contribution to the early victories of Nazi Germany during World War II was significant. Later in that war the turrets
Mk 7 helmet body armour and tipping the front rim over his eyes. The Mk 7 helmet is lighter than its predecessor – 1 kg instead of 1.5 kg for the Mark 6 helmet – and has better chin strapping for stability. It is produced in a new colour - tan, unlike the Mk 6A in black and Mk 6 in olive. It has been adopted for use in Afghanistan. The ballistic protection is measured with V and for the Mk 7 it is about 650 m/s. (V is the "mean penetration velocity". At this velocity, half (50%) of projectiles are expected to