The AR15 tactical charging handle will fit Mil-Spec AR15 upper receivers. They can be used with an assortment of calibers. The material is made from aircraft grade aluminum and hard coat anodized. The tactical charging handle is 2 7/16” wide. It is wider than the standard charging handle for better grip. A perfect replacement for the factory charging handle. All design and work are performed at the Molon Labe® facility in Arizona. Made in the USA.