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It is an improved Mauser , a bit like the surgeon is an improved Remington :-)

I saw those two grouves below.
It is a bit like a Barnards, tikka ...and the sako 75,85 and A7 where the recoil lug is not an integral part of the action.
The reason they use that system is to cut...

Actually, I don't know how hard it would be, but could you cast the next action with an integral front recoil lug? That would be one more part out of the equation later on.

Still need a bit of work, but 70% is done.
Do you have to heat treat it?
Winchester 70 and some old cz were cast as well.
Awesome