What we are looking for is the level of Indigenous content offered by this company.
We might we looking at an actual cheetos seller here.
Now the core of a gun is the barrel, Trigger mechanism, gas transmission, gun housing and bolt rest all are secondary and are easy to develope.
Now when it comes to gun barrel it requires precision and metallurgy.
We already make gun grade steel so they most likley sourced the metal from the same place OFB gets its steel from.
Tho depending upon the climate and place of operation some Metallaurgical parameters may be altered to optimize gun performance.
For instance guns made in Europe will be different from guns made in US, as they use different grade of Steel.
Next is drilling the hole.
This requires extreme precision otherwise even rag tag Afghan make guns in huts but that will differ a lot from a gun made in Factories in terms of quality.
For it machine like this are used.
For more info check this site.
https://www.unisig.com/products-and-technology/machines/find-a-machine/by-industry/firearms/
I wonder if they have bought these machine, a downgraded version of this is in our college and that alone costs around 30 to 50 lakhs.
Next up is designing the grooves
After bullet the power, speed and stability of the gun depends upon Grooving.
U have to consider a lot of factors here. The amount of rifling land, the swirl degree of groove and after processing.
The differnce between a gun made by Afghan and that made by sig is like that of Adidas and Abibas