The sub-calibre nature of the round means it travels extremely quickly at 1,400 m/s. This allows it to effectively engage low flying aircraft and helicopters up to a range of 4.5 km. Instead of using a conventional impact fuse, M830A1 is a sub-calibre HEATFS round that has been saboted into a 120 mm casing and fitted with a proximity fuse. The M830A1 is a special type of HEATFS round. It is not recommended to use this shell after unlocking the M829. The M830 HEATFS shell penetrates a meagre 480 mm of armour. It is sufficient to reliably engage any vehicle in the game frontally. Its angled performance is also excellent, penetrating 346 mm of armour at 60 degrees point-blank and 324 mm at 2 km. The M829A1 APFSDS round is an excellent anti-tank munition, boasting high penetration figures, at 598 mm of flat penetration at point-blank and decreasing to just 560 mm at 2 km. However, the M1A1 HC also gets access to a new HEATFS shell, M830A1. The M1A1 HC is armed with the same 120 mm M256 smoothbore gun as the M1A1 and has access to the same ammunition of APFSDS and HEATFS. For users who have enjoyed the M1A1 Abrams gameplay, the M1A1 HC features improved capabilities to make the most of the firepower, armour, and mobility of the Abrams platform. The mobility of the M1A1 HC is not too different from its predecessors. The firepower is also improved with access to the M830A1 HEATFS round that includes a proximity fuse, meaning it is useful not only on enemy armoured vehicles, but also low-flying aircraft to swat them out of the sky.
WAR THUNDER WIKI UPGRADE
It has armour improvements due to incorporating the "Heavy Armor" (HA) upgrade that includes depleted uranium inserts.
WAR THUNDER WIKI UPDATE
The Tank, Combat, Full Tracked, 120-mm Gun M1A1 HC, introduced in Update "Direct Hit", is an upgrade of the preceding M1A1 Abrams. The USMC simply referred to the tank as the "Common". As this new design was used and sent to both US Army and USMC, the tanks became known as the M1A1 HC within the US Army, with "HC" standing for "Heavy Common". Requesting some modifications to better suit the USMC purposes, the M1A1 Abrams incorporating the changes began production in November 1990. In the mid-1980s, the US Marine Corps (USMC) considered the M1 Abrams as a replacement to their M60A1 tank fleet.
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