Here's a horrible idea...

Seriously. You're going to get somebody shot.

Apparently the Ferguson PD is testing this thing?  What the hell is wrong with a Taser?  At least you don't have to draw your real gun, and point said gun at people.  Or just get freakin' bean bag rounds for the shotguns... that thing is just going to make things worse.

After traveling through the barrel, the bullet embeds itself inside the alloy projectile, and the docking unit immediately detaches from the weapon, according to the manufacturer.

This process decreases the bullet's velocity and dampens its impact. The bullet, then, should not pierce a human’s skin and cause the type of internal damage that would kill the person. However, it retains enough blunt force to knock someone over and deliver severe, debilitating pain.

What could go wrong?