An Israeli company made this double-barrel AR-15 for the US
In following the grand tradition of "if one is good, then two must be great" thinking, Israel's Silver Shadow firearms manufacturer is marketing this double-barreled AR-15 for sale in the United States. Check out this double-barrel rifle no one asked for that the military will never, ever use.
But just because the military won't ever use it doesn't mean civilians won't try to have fun with it. After all, this isn't the first time someone thought two barrels was better than one.
Besides, it works for shotguns, right? Why not AR-15s?
Originally marketed as an AR variant under a company named Gilboa, Silver Shadow makes this line of double-barreled weapons here in the U.S., where the 16-inch barrel, twin-trigger rifle is legal for civilian use. The twin trigger is how the company avoids the Bureau of Alcohol, Tobacco, and Firearms' definition of a machine gun.
Each barrel of the Gilboa Snake has its own independent gas block and tube, meaning it can fire multiple rounds with each trigger without the delay and recoil of the weapon cycling between trigger pulls. It also has two separate ejection ports, so hot brass can go down the shirt of the person laying prone to your left and right.
Everything else about the rifle is made with standard AR-15 parts and it still fires the 5.56mm NATO round. Most importantly (in the unlikely event someone were to use the rifle in combat), the weapon also utilizes two standard magazines, one feeding into each barrel.
How to zero the Gilboa Snake
Zeroing the weapon requires zeroing both barrels independently of each other and then zeroing them relative to one another. Then you need to zero them together, as shown in the video below.
Firing a double-barrel AR
The guys over at Guns and Ammo got their hands on an early version of the rifle a few years back and demonstrated firing it at a range.