At least half of U.S. states now outlaw devices that can convert pistols into machine guns In ... prohibiting the possession of such devices, a list that has grown over the past decade as law ...

Commentary: Until manufacturers take reasonable steps to prevent their guns from being illegally converted, the guns shouldn't be sold in New York.

In New Mexico, police and prosecutors backed an effort to outlaw devices that convert pistols into machine guns ... the possession of such devices, a list that has grown over the past decade ...