That's where our intelligence or should we say stupidity comes into play.Yeah, I saw that, circa 50 cm at a distance of 2000 meters at 0 degree angle. But how are they supposed to provide protection level of 600mm RHA equivalent and simultaneously keep the weight below 25 tons as well??!!
IA has issued an RFI. They are just releasing a blanket requirement based on which a model would be made. After that PSQR/GSQR would be released based on user test and trials. So basically IA could ask for 1000mm equivalent of RHAe. It depends on the designer to seat together and deliver a product and show the pros and cons.
600 mm equivalence is not the final word. They have given the bare minimum requirement. Its on the designers to show them whether its practical or not to accommodate that with all other requirements they are looking for.