I do have a M40 and it is on a 40X with the stripper slip cuts. I will say the 40X receivers are just 700 short action receivers pulled off the line and stamped 40X.
I had a 40X and regular 700 trued at the same time, my guy said the reg 700 was better out of the box than the 40X.
His clip slot cuts on the Reg 700 worked better than the Remington cuts on the 40X.....
