Thanks, I am going to draw up the Barnard S in Fusion360 this weekend and 3d print it as a solid model and take it up to John to try initially I think. My problem / concern is I'm told the S is 10mm longer than a 700SA but pouring over the drawings I can find I see only 5mm. So It maybe I need to open the KRG slot in the chassis some 3~7mm with a vertical milling machine and then make a distance piece to infill the distance between the recoil lug plate to chassis rail bearing surface. The Q is is there enough material to do this. Yeah any gunsmith or machinist could do this, even me if I had a vertical milling machine if there is enough metal to do so. Otherwise I'll look around for alternative actions I can use.
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