Yes, the mag well is ever so SLIGHTLY lengthened - I am taling not even 1/8th inch.
Every stock with the exception of ONE I got from Mario was superb, with 2 being almost NEW UNISSUED condition. Just have to ask him fgor detail shots to make your selection. I ask him for a specific code, he selects all he has of that code then photographs my particular detail areas - bolt recess, inletting top, markings, etc.
Despite what some say, PRIME examples can be had. Disbelieve the MYTH that all are scraped, sanded etc, as it is hogwash. A LOT are, but then examples like this can be had...