Here are some pictures of DWM 1917 LP08 7029e with barrel shortened to 4.5 inches (
http://luger.gunboards.com/showthrea...highlight=lp08).
In addition to cut and sleeve of the barrel and front sight, the barrel stub was also turned down, apparently to approximate the barrel diameter to the front sight sleeve diameter. Picture 3 compares barrel of 7029e to another unaltered 1917 LP08. From point A to B, diameter of 7029 barrel goes from 15.75 to 15.00 mm whereas normal barrel progressed from 15.80 to 15.25 mm. Picture 4 shows light milling marks on barrel of 7029. The joint of barrel stub and sight sleeve was concentric and nice (picture 5) although the sight sleeve was slightly smaller (14.70 vrs 15.00). Picture 6 of the muzzle of 7029, shows the 1 mm peripheral rim of the sight sleeve that barely catches a fingernail. This looks like a lot of work by what I would assume was a experienced machinist.
John