At a glance, the M16 and M4 look like close relatives because they are. But in actual use, these two rifles behave like tools shaped for very different kinds of work. The M16 and M4 both descend from ...

To gun enthusiasts, it is an effective, lightweight weapon. To anti-gun advocates, it's a symbol of mass shootings. Experts estimate approximately 16 million adults in the US now own at least one of ...