Different types include steel, stainless steel, titanium, aluminum
steel
Plastic and metal
SteelSteel
Zinc or pot metal
No and no.
Made from surrendered enemy gun metal.
In return for its abrasion.
Blue Book of Gun Values
rubbish I think they were all made of metal . All that I have seen were black, like gun metal, but some may have been brass or some other metal.
Wood, plastic and sheet metal
Made from surrendered enemy gun metal.
Walther PPK/s by Umarex. It has blowback, it made of metal and it's James Bond preferred gun.