GeoW,
FWIW, McMillan wanted to make a polymer stock in some of their more popular patterns that would be cheaper and available without a long wait, which are their two biggest complaints around here.
The Mc3 is the most legit polymer stock I've ever handled and heavy as a brick!
The A5 pattern that I handled was extremely heavy. 4-5 lbs estimate.
It may not be your cup of tea, but ya sure gotta appreciate McMillan stepping up and taking a swing at an alternative to a 6 month wait and $700+ price tag even if it hasn't been a homerun.