"This mag was pretty cool and I've gotten lots of kill with it. However, it didn't last as long as i expected. The internal parts are metal and work good, so nothing to worry about. However, the magazine itself is made of rather cheap feeling plastic. It fell apart a little less then a year after my dad got it for his gun. And if you want to take the green clamps off that say 'US' on it, forget it. They aren't just for decoration. A great buy. Looks cool, works great, but if you do not have one, buy a large utility ouch because it won't fit in any normal mag pouch."