500mm of heat pen is very little especially when the atgm on the t55am pens 600mm just asking the community.
remember, everything on the dev server is subject to change, you can look it up and find out, but this may not be its final pen
It is accurate, its what stated anywhere you can find. Remember that Rubin is quite an early barrel launched ATGM, for the time it was made, it would be enough for everything. 9M117 on T55AM/AMD was introduced much later.