I suppose contracting with McMillan using a laid-glass stock would put the price-point of the MRC out of reach. Hence they're using a cheaper chopped glass stock.

Kimber got around that conundrum by building their laid-fiberglass stocks offshore.

The MRC stock design reminds me of a maker from the Kalispell area some years back. Same guy built Rifle Inc's stocks IIRC.

I won't say much more than that...

“Perfection is Achieved Not When There Is Nothing More to Add, But When There Is Nothing Left to Take Away” Antoine de Saint-Exupery