Bf 110 G-4/U7, Night Fighter
As Bf 110 G-4, but

Fuel: additional 440 kg GM 1 for 45 min
Flexible armament: without MG 81 Z
Armor: none in aft compartment

Compare with Bf 110 G-2/U7. The first ten Bf 110 G-4/U7 high altitude night fighters for combating Mosquitos were delivered in June 1943, and were in fact converted Bf 110 G-4s. The General Staff ordered that 50% of the aircraft be so equipped on 6/29/43. According to a report in the RLM, the field considered the GM 1 systems to be useless and potentially dangerous ballast in some cases and, since the British never flew at altitudes above 8000 m, these were largely removed. At this time the systems had not yet been fully developed. Trials with Bf 110 G-4/U7 W.Nr. 5457, NM+SE at Messerschmitt's Augsburg facility showed that the aircraft with full GM 1 tank and without ammunition was tail-heavy and unstable at higher altitudes. This effect was exaggerated with extended landing flaps, making any second pass after an aborted approach nearly impossible.

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