The House of Representatives has approved a package of limited reforms to federal gun laws. The Protecting Our Kids Act passed Wednesday by a vote of 223 to 204, mostly along party lines, with five Republicans in support and two Democrats voting against it. The bill would raise the minimum age for purchasing semiautomatic firearms from 18 to 21, ban magazines of more than 15 rounds and toughen penalties for gun traffickers and straw purchasers of firearms.