Yep. Concur. 75mm CN-75 stayed viable well into the 1960's and if you could take a CN-75 (copy of Kwk-42) you could probably take a 105mm. The balance is always for HE and AP performance. L7 105mm is and was an outstanding tank gun, but it does require a good chassis.
Something like the 76mm low-pressure L-23 is probably all you need for fighting the Taliban.
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