Well, here are 2 references to what was picked up with the Lackawanna group:
How police caught up with the 9/11 mastermind
America, FBI agents raided several locations on Friday in the Buffalo suburb of Lackawanna, New York. They arrested five Americans of Yemeni descent and removed what appeared to be two AK-47 rifles.
FBI: U.S. High Schoolers Became bin Ladenites
While in training, the eight Lackawanna men allegedly received "instruction on firearms," including the use of sniper rifles, assault rifles and explosives. The criminal complaint states that Derwish was observed receiving more advanced training in heavy artillery...Investigators, he said, had found two guns and a telescopic sight at al-Bakri’s home.