One bad idea after another.

WASHINGTON (AP) — Syrian rebels battling the forces of President Bashar Assad must receive ammunition and heavy weapons to counter the regime’s tanks and aircraft or it will be impossible for them to prevail Sen. John McCain said days after he quietly slipped into Syria to meet with the opposition.

“They just can’t fight tanks with AK-47s,” McCain said Friday in a telephone interview.

The Republican lawmaker and 2008 presidential candidate made an unannounced visit to Syria on Monday, traveling across the border near Kilis, Turkey, and spending about two hours meeting with rebel leaders. McCain has been one of the most vocal lawmakers demanding aggressive U.S. military action in the 2-year-old Syrian civil war, calling for establishment of a no-fly zone and arming the rebels.

The Obama administration has been reluctant to provide weapons to the disparate opposition, fearing that they will fall into the wrong hands in a volatile region. McCain said he discussed what types of weapons the rebels need and whether they could ensure their control.

“I’m confident that they could get the weapons into the right hands and there’s no doubt that they need some kind of capability to reverse the battlefield situation, which right now is in favor of Assad,” McCain said.