While we were apprentices and the No4 rifle was our daily bread and butter, our technical and practical trade instructors used to impress on us that you could have a No4 (or any Enfield) with a perfectly gauged barrel or a sewer pipe barrel that would still shoot accurately - or at least accurately enough to pass the accuracy test. But with a badly fitting fore-end, you would NEVER have an accurate rifle. Never heard truer words to this day. Some sniper rifle barrels would look like crap and barely gauge up but would shoot like a dream. Crap fit fore-end, No4 or L42/39 and you had a crap shot rifle