But at what cost sirji? With an MRP of 2200$ per piece(if separate 300 blackout barrel and parts are not bought), MCX remains a SINGLE CAL weapon for us. An average Excalibur MK1 would cost anywhere around 600$ to 800$ after all such mods done as above. Not only you can buy 3 modded Excaliburs but also optics for it can also be bought.
I agree 100% that MCX is a completely different beast and is my personal favourite NON AR rifle. But when it comes to arming 100s of thousands of soldiers with a rifle that is easy to learn, less on recoil, extreme condition tested, easy to disassemble and reinstall and cheap, then I guess nothing beats a regular INSAS family rifle. Now I am also 100% sure that if quality of materials like polymer, metal and quality of craftmanship is improved, INSAS will become one of the most versatile battle proven rifles to ever exist on earth(point here being cheap and easy to produce in mass).