They are just playing with AR-10,which first went into production in 1956 and lost to M-14 when US was selecting a new MBR.
AR-10 is simple and modular weapon but has got issues of it's own.I don't think Govt would select a firearm from POF when same can be purchased from abroad and more favourable price, the firearm you have seen in video is compareable to Turkish MPT-76.Turkish Govt invested around 20 million USD for getting this project done,i don't think Govt would purchase PK-18 and invest time and money into new production facility when they can just get MPT-76 at favourable price.
G-3 problems;
G-3 is a roller delayed blow back weapon,uses a set of rollers to delay bolt backward movement after a cartridge is fired,is manufactured by stamping and machining.
- It's a bulky and long weapon,you can't use that in CQB.
- Recoil impluse is very heavy only a seasoned user is able to maintain a sight picture.
- Stock is not inline with "bore" and "bolt" and is uncomfortable.
- Weapon can't be controlled during full auto.
- Blowback system allows a lot of dirty gas back into the action it gets quite dirty due to residual builtup.
- Not a clean system as compared to other one's.
- It get's hot that too in fairly short time.
- Fair amount of practice is needed for inserting Mag in correct manner during stress.
- It has double feed issue,if your mag touched something during fire.
- Gun won't achieve battery during extreme cold,you have to chamber a round during day time or at place having room temperature.
Some of these issues can be removed like putting a buttstock at approporiate angle inline with "bore axis" for recoil control.
Putting a compensator would mitigate recoil.
Bipod Handgrip can be added into every handguard for managing recoil and maintaining sight picture during auto fire.
A small barrel for CQB.
Changing feed system design for faster reloads and failure free working, a Curved mag and straight mag well coupled with bold hold open system.
Locking Shoulders and roller metallurgy should be changed taking low temp conditions into account.
Heat and carbon/soot issues can't be workes since they are due to design.
At time when contract was signed it was good rifle for us,fairly simple to make and having less moving parts.But as of today it's not.It has served us well and needs a break.
There is no new kind of manufacturing process which we can adopt and for which someone can sanction us.Multiple axis cnc machines are used for building metal parts while injection molding is used for building poly parts.
I hope your all questions have been asnwered