johnny ---- The Naval Lugers had (have) a 6" barrel and a two position (100 meter & 200 meter) rear sight on the rear toggle link. As I've read somewhere German Navy personnel sometimes went ashore as landing parties and required personel weapons that were capable of longer range than a standard hand gun could provide. The Navy Luger was adopted in 1904, about 4 years prior to the German army adopting the P.08 (4" barreled) pistol. I've also read where Navy personnel might on occasion shoot from one ship to another at ranges of a few hundred yds. I wonder about the truth of that account. As I mentioned above if anyone has a chance to shoot a Naval type Luger, you'll be very impressed by them. Mine is not a collector's piece having been beautifully refinished so I shoot it on a regular basis with my own reloads as weather permits.