Retired Gen. Stanley McChrystal called for “serious” gun control measures on Tuesday, saying the weapons used by his troops in Afghanistan don’t belong on the streets of America. McChrystal said the M4 Carbine he often carried in the military held a .223 caliber round capable of doing “devastating” damage to a human body. “It’s designed to do that, and that’s what our soldiers ought to carry,” McChrystal said on MSNBC’s “Morning Joe” Tuesday morning. “I personally don’t think there’s any need for that kind of weaponry on the streets and particularly around the schools in America."