I had a very close look at an AX that had the rail on the receiver slightly angled and not perfectly parallel with the action. What tipped me off was looking down the two rails and seeing the direction change of the centre groove once it met the forend rail. On top of that, the action is ever so cockeyed in the chassis (a bit angled and not square) which also contributed to this. I caught the chassis issue while trying to figure out why the heavy barrel that it had was a little closer to one side of the forend than the other. Using a straight edge along both sides of the scope rail on the action definitely showed that it was off in relation to the barrel centreline. 0.6 Mils of windage to zero. Not sure if that’s relevant or not, could be the barrel timing too, I don’t know. The thing prints clover leafs though. I feel that I can easily pick out the flaws in anything. Which sucks. Takes the fun out of everything for me.