Why do you say that?Any new design is looking at no less than 6 -10 years of trail and error ..
Give Dhanush manufacturing to TATA or L&T besides just OFB and you will have numbers ..
45cal is gud enough, Just increase production rate ..
The ATAGS is being designed with the explicit goal of touching 50 km range. Something that can only be done with 52 Cal. The difference in weight for the 45 cal and 52 cal is not going to be too much.
Ultimately even 400 pieces of 45 cal are a good number. I mean if they make it, which is likely to be the case.