More than 40 students who marched from Madison to Janesville say they want a ban on military-style guns and accessories, a four-day waiting period for gun buyers, background checks on all gun sales, and the legal age to buy a gun raised to 21.  The students spent four days marching about 50 miles to House Speaker Paul Ryan’s office in Janesville.  Ryan is in the Czech Republic on an official visit.  The marchers were joined by others from around the state urging the Republican Speaker to take the lead on gun reform.