20mm antitank rifles with HEAT rounds?

[Ulzgoroth]

Originally Posted by sir_pudding

The M1A1 doesn't need or use reactive armor and is probably not to be grouped in the less fortunate category...

The TUSK kit adds reactive armor to the sides.

I don't know whether or not the side armor without that would be sufficient to stop those grenades. I don't know of estimates for Abrams side armor performance.