The Secret Service replaced the Thompson submachine gun often used by federal law enforcement in the Prohibition Era with the Colt AR-15 rifle for long-range protection, along with the Uzi submachine gun for more concealable firepower in the 1960s and 1970s, respectively. Uzis used by the Secret Service had slightly shorter-than-standard barrels so they could fit inside the standard size Samsonite briefcases that concealed them. This setup was famously deployed by Special Agent Robert Wanko during the 1981 assassination attempt on President Ronald Reagan. The agency, like many others, phased out the Uzi in the 1990s and replaced it with the H&amp;K MP5 submachine gun. The Secret Service was the last Federal agency to use the Uzi. The Counter Assault Team used the M4 carbine from the early 1990s until 2006.