I was tempted not to help you because I am not a big fan of New England Patriots…only kidding there! Normally German panzers have buff (off white/ivory) color painted for its interiors. You can look at pictures of King Tiger at Patton Tank museum… I googled to find this picture. Google is a great tool if you wan to find more pictures.
I have noticed that Dragon’s paint instructions are really nasty. I have their P51D in 1/32 scale and they reference paint numbers they don’t even have on the chart. I usually just look for color images of the subject on Google and go by the images.
Oh, that’s the machine gun… not the main gun I assumed you were asking about. For machine guns, it is usually painted in gun metal color. Some MG 34s came with very dark wooden handles while other handles were in black for the vinyl type like shown in the picture. I usually use Model Master Gunmetal then highlighted with MM Steel or lighter.