Re “A Powerful New Revolver Is Already Drawing Fire,” Feb. 14: Congratulations, Smith & Wesson, on your exciting new weapon of massive destruction. I’m sure the corporate parties have already begun.

Drug syndicates have used .50-caliber ammunition, produced at a plant owned by the U.S. Army and then smuggled across the border, in attacks on Mexican civilians and police. By Ben DooleyIsabella Cota ...