Appears none of the AMX-30 tanks have stabilizers in the game. According to wikipedia, however;
"During the production run many improvements were implemented. These included gun stabilization from 1971, and from 1972 replacing the original coaxial heavy machine gun by a dual purpose 20-millimeter (0.79 in) autocannon against light armour and helicopters, with the ability to depress to -8 degrees and elevate to 40 degrees."
http://en.wikipedia.org/wiki/AMX-30
Didn't find information on whether the export version (AMX-30S) was similarly equipped, which might be relevant at least to battles involving Qatari tanks vs. Iraqi tanks during 1991.