Tungsten Alloys is “Green Bullet” in Army

Tungsten alloys are not used in the “green” or lead-free bullet. The bullet are “green” because they are considered more environmental friendly than bullets containing lead. Green bullests typically contain tungsten that is mixed together with either nylon or tin. Tungsten alloys used in armor-piercing munitions, on the other hand, contain other metals, such as nickel, cobalt, iron, or copper, and are subjected to high temperature and pressure to bond the materials together. 

Now the green bullet has been widely used in Army installations.

The above is collected from ctia.com.cn. For more information, you could visit tungsten-alloy.com/en/alloy04.htm.