The stock inletting for both the L61R and A-III are identical, despite small differences in the bolt shroud and perhaps the shape of the bolt handle. The bedding for both actions is identical to the A-V except that the A-V has a longer tang (the metal where the rear action screw seats just behind the bolt). An L61-R or A-III stock can be adapted to the A-V by inletting a bit of wood for the longer tang; A stock for an A-V can be adapted to the L61R or A-III by filling (or not, I suppose) the extra inletting for the longer A-V tang. Stocks for all calibers are identical.