Looking it up, while this specific weapon is likely fictional, the Hypervelocity Anti-Tank Missile was a real anti-tank missile development program developing and serving as a test platform for the US Army's Compact Kinetic Energy Missile program. Raytheon had a test launch in 2002, and the test vehicle was 6 inch in diameter and 50 inches long, which apparently made it promising to be compatible with existing TOW tube launch systems.
Looking it up, while this specific weapon is likely fictional, the Hypervelocity Anti-Tank Missile was a real anti-tank missile development program developing and serving as a test platform for the US Army's Compact Kinetic Energy Missile program. Raytheon had a test launch in 2002, and the test vehicle was 6 inch in diameter and 50 inches long, which apparently made it promising to be compatible with existing TOW tube launch systems.
If you're talking about the LOSAT I'm aware of it, but the naming scheme in the commentary is more suggestive of the ATGM series in service with the Japanese army (87式対戦車誘導弾 Type 87 Chū-MAT, 79式対舟艇対戦車誘導弾 Type 79 Jyu-MAT, 64式対戦車誘導弾 Type 64 MAT).
If you're talking about the LOSAT I'm aware of it, [...]
Don't think that is the same thing, as this uses the term HATM and was a development program from 1996 to 2002 by Raytheon, Alliant Tech Systems, and NAMMO to develop a lightweight, compact, potentially low-cost missile that could reach speeds in excess of Mach 6.5 to defeat line-of-sight targets.