Dons, when I said "Rare factory configuration" I was talking about the long, horn tipped foreend, not about barrel length! The barrel certainly has been shortened and the band foreend swivel added. I am not sure if the peep sight may have come from the factory, on those early Mausers everything is possible, or if it is a later modification. The rifle in the Mauser Archive has got the same configuration with the long, horn schnabel tipped foreend, but a much longer barrel and the sling swivel through the foreend into the barrel band.