TikkaShooter
Nice bring-back from WWII! One thing you might want to do is have a qualified gunsmith look the gun over as late war (your Mauser built P38 was made in 1944), weapons manufacturing in Germany was subject to numerous shortcomings in terms of overall quality. Some things that affected the weapons industry was the use of substandard materials, improper heat treatment, manufacturing shortcuts, use of slave labor for building and assembly (guns and ammunition were often times sabotaged by the forced laborers), and constant bombings from Allied air forces caused numerous problems with the supply line to the factories.