I feel sorry for the French. It must be like doing calisthenics what with the posts saying it’s real and then it’s not real. Each time they hear it’s real they gotta drop to the ground in surrender. Anyway, stay down Frenchies. It’s real. Here’s the Patent.

Here’s an explanation how it works from a reader:

The people writing to you to slam the DREAD are missing a simple piece of physics: the gun supposedly converts *angular* momentum (of, I assume a rapidly spinning disk) into straight-line momentum. This is the equivalent of a machine in a batting range throwing balls at you, or doing a round-house throw with your arm–your arm doesn’t recoil backwards when you simply let go of the ball (one more example would be a driver hitting a golf ball–the head doesn’t recoil when it hits the ball, it slows down dramatically–giving its momentum and energy to the ball.)
The equal and opposite reaction required by physics might cause the gun to twist, but not recoil.You could also overcome any twist by building the gun with two matched centrafuges, each spinning in the opposite direction. If these two disks were to fire sumultamously, it would eliminate any movement of the gun. The two disks would simple slow down a little every time they fired.

And here’s a video.