The Luger was a standard-issue German pistol used in both World Wars and was the first weapon to use and spread the 9 mm Parabellum round, today the most common pistol cartridge. Strangely, they have shown up commonly with survivors, despite being a collector's item. Most Lugers are now used with extended magazines to put them on the level of modern weaponry.
You might want to work on the texturing and shading for the grip of the gun because it hardly looks like wood other than a brown lump of pillow shaded filled in brown space.
changed the name to correct it but other than that its good. Its more commonly know as the Luger P.08 short for 1908 the year its was 1st manufactured.
Over all this is not bad a bit simplified but good none the less. Very original indeed.
You could add a fictional extended magazine for it since the sig has a 13 round mag.
Here are some reference images for both the standard 8 round box and 32 round snail drum magazines the luger used.