[Paper]

Originally Posted by acarpenter

Anyone know why the metal on some of the 03A3s, such as mine, tend to take on that Greenish tint?

That's parkerizing..

Here's a link on info.. Parkerizing - Wikipedia, the free encyclopedia

Many firearms that are Parkerized turn to a light greenish-gray color within a few years, as the coating ages, with the protective coating remaining intact. Cosmoline, especially, interacting with Parkerizing, can cause the highly-desired and attractive greenish-gray patina to develop on firearms that are stored in armories.