A federal jury convicted Afghan national Mohammad Sharifullah for participating in a 9-year conspiracy to provide material support for terrorists.
U.S. troops have been in Germany continuously since 1945, when American forces occupied the country after World War II.
The 34 changes will be more amendments than the ATF has issued in the last 15 years combined.
The shooter was a loner and had suicidal tendencies, among other issues, investigators found.

The men were accused of taking part in throwing debris and fireworks over an overpass onto law enforcement below.
The aircraft carrier USS Gerald R. Ford has supported U.S. combat operations in Venezuela and Iran over the course of a nearly yearlong deployment.
Herbicide, a controversial ingredient called glyphosate, cancer, and a major chemical company, are before the Supreme Court this week.
There is currently under a ‘do not drink’ order in the affected area, and water will be turned on only for flushing toilets.
Democrats point to legislation and litigation as possible actions following the 6–3 ruling addressing the use of race in redistricting.

The new congressional map could add four districts favorable for Republicans and add to the party’s slim House majority.
The risk of terror attacks against U.S. citizens remains high, the U.S. State Department warned.
A federal district court had ordered that a second black-majority congressional district be created in the state after finding black voters underrepresented.
As part of the Treasury’s policy of ‘Economic Fury,’ it is targeting Iran’s network that finances terrorism and the military.
Blanche said the White House press dinner shooting proves the need for the new ballroom.
Democrats leading the war powers resolution noted recent U.S. combat operations in Venezuela and Iran, and the president’s recent comments that ‘Cuba’s next.’
The president said the Iranian government communicated that assessment to U.S. officials.
Supreme Court heard arguments as demonstrators warned Monsanto ruling could erase thousands of pending cancer claims.
A legal challenge to the state’s redistricting amendment was argued Monday before its Supreme Court.
Estimated improper federal payments have reached about $3 trillion since fiscal year 2003, according to the Government Accountability Office.
Cole Allen, 31, of California was also charged with transporting a firearm across state lines and discharging a firearm during a crime of violence.