katt wrote:Fri is being deliberately misleading. The tests were done with Kontakt-5 ERA fitted, and it was found that only M829 couldn't penetrate the frontal arc. M829A1 could perforate T-72M's frontal armour when protected by K5.
M829A1 was only for M1A1 and it was available only from 1988 (M829 from 1983), we are talking totally different caliber cannon (M1A1 120mm vs M1/M1IP 105mm).
The test were original T-72 against M1 Abrams what had 105mm cannon.
T-72 front hull armor was 400mm RHA and NATO did not have anything to penetrate that until Leopard 2 came and it had DM13 shells what penetrated 410mm RHA. Ammunition what NATO had for penetration was usually 300-350mm RHA and at best 390mm RHA. In '80s the situation changed and they got better ammunition but again there were T-72A and T-72B what had again much better armors.
And it was not until 1982 Lebanon war (http://www.waronline.org/IDF/Articles/t ... index.html
) when Israel have M111 Hetz 105mm shell what was capable to penetrate T-72 front armor but not the turret (Soviets own firing test after Israel claimed to have destroyed 9 T-72 with Merkava what had american M68 cannon.) and then they developed T-72M1.
Edit: Source link