Disrupted Tank with AT value 0 - can he still fire?

[triangular_cube]

you actually had a second question...

would a 2-5 (for example) AT gun, which became disrupted, be able to fire at long range? as it is now a 1?

I think the answer is yes....the characteristics of the weapon have not changed, it's effectiveness has....
so probabilities it is effective at longer ranges is reduced (2->1)...but it can still fire at range.

I think the "2" factor chosen is trying to differentiate the small caliber weapons which have some AT utility....(AT rifles ...what other weapons are <2?)

I always thought that the "2" factor was chosen based simply on the math. Any 1 or 0 would be split in half for the long range shot, then rounded back to 1 or 0 because you always round up, effectively just making their normal range 150% of the printed value.