i am, sorry was a bionix gunner. i not sure of current armour doctrine. In nsf days, it the 2 amx13 in front while APCs behind in support and provide infantry support. during reservist days, SAF change doctrine and become bionix probe in front while the amx13 cover from the back. If the armour tag team are to encounter oppostion armour on the fly, then the engagement distance will be less than 100 yard. But the chance of bionix burst into flame from a burst of PT91 12.7mm HMG is higher than the 25mm AP penetrating the reactive armour of the PT91. by the way, the way bionix operate is suppose to command high ground covering key axis, so having a TOW do made sense. SAF do operate the bionix like a tank in these scenerio where the IFV hide from view on the back slope while the VC hide in the forward slope. AMX tankees would understand what i meant as they operate in the same manner in the past. At a high ground, the engagement distance extend to 2klicks.