The Army is Developing a New Bullet: Here's What We Know

In addition to being a larger projectile, 6.8mm over 5.56mm, the 6.8NGSW has one feature that makes it stand out in a display: it’s caseless. Well, sort of. Instead of a standard brass case like most bullets have had for the last century, the 6.8NGSW has a polymer case that takes advantage of new materials. This gives the bullet a more squared-off look and necessitates the development of a new set of guns out of which it is to be shot.