Here's what Senich said about the Remington records of the M40 stocks;
Quote
The walnut stock, a sporter-type with an integral cheek rest (Monte Carlo style with cheekpiece), was described by Remington as a "ADL type for 5-round BDL-type magazine, no fore end tip or grip cap, 13-3/8 inch length of pull (factory standard), no checkering, non-detachable swivels, oil finish"