I've come into possession of a Walther U.P. Mod.1. But it doesn't look like the Mod 1 pics I've found on the internet. It's 4 1/8 in lone 3 1/8 high. The clip is not like any magazine I've ever seen and inserts to the back of the gun. The fire selector (saftey) is on the right above the handle not in front near the trigger like the Mod 1 pics I've seen. The saftey has 3 positions F /// E /// S. When put on E and the trigger is squeezed the back of the gun pops open and the magazine backs out of the rear of the gun??? The rounds sit VERTICALLY in the gun. There's no blowback action and the barrel diameter of the barrel seems to be far larger than the diameter of the round.. Any Ideas??????