i may return to the shop and purchase it so that i can strip it down and take photos/investigate markings and stampings. it is atleast possible that if the stock is not painted red near the upper hand guard area, (which i didnt notice the last visit), then the notch would could have been one countrys (denmark) way of establishing the correct caliber/ammo for a soldier to use with it. if i undersstood CS Ferris correctly, perhaps as few as 5K were imported from denmark in the 90s, from about 38K originally sent there from canada, britain, and norway. if correct, i should expect to see stampings and possibly proof marks from each former lend/lease country. interesting.