Classifier Instance:

Anchor text: MG 151/20 cannon
Target Entity: MG_151_cannon
Preceding Context: The basic A-series aircraft were armed with two 7.92 mm (.312 in) MG 17 machine guns and two 20 mm
Succeeding Context: s in the nose and delivered as the Me 410 A-1 light bomber. The originally planned Me 410 A-2 heavy fighter was cancelled because the dual 30 mm (1.18 in) MK 103 cannon pack was not ready in time. The Me 410A featured a bomb bay for carrying air-to-ground ordnance or for the installation of additional air-to-air weaponry or other equipment. Initially, three Umrüst-Bausätze (conversion kits) were available, U1 contained a palette of cameras for the photo-reconnaissance role, U2 two 20 mm MG 151/20 cannon with 250 rpg for the heavy fighter use, and U4 used the 50 mm (2 in) Bordkanone series weapon, the BK-5 cannon with 21 rounds, to turn the aircraft into a dedicated bomber destroyer. The BK 5 cannon - derived from the Panzer III tank's main armament, the 50 mm (2 in) KwK 39 L/60 - allowed the Me 410s to shoot at their targets from over 914 m (1,000 yd), a distance at which the bombers' defensive armament, usually consisting of the "light-barrel", .50 calibre AN/M2 aviation version of the M2 Browning machine guns, was useless. Frequent problems with jamming and limited ammunition supply (together with the extra weight of the large gun) made the other anti-bomber versions of Me 410, especially those with extra 20 mm MG 151/20s, much more useful. The dedicated reconnaissance version Me 410 A-3 received a deeper fuselage for additional cameras and fuel. The Me 410 A-3 entered service in small numbers in early 1944, and equipped three long-range reconnaissance Staffeln, known as Fernaufklärungsgruppen (one on the Western Front and the other two on the Eastern Front).
Paragraph Title: Variants
Source Page: Messerschmitt Me 410

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