I'm feeling generous today so I'll try and paint the picture a little better for all the retards (including Wayne) out there.
The reason Bump Fire's and their ilk are not Class III is because they do NOT dictate the cyclic rate of a weapon. The SHOOTER dictates the cyclic rate of the weapon when using these devices. When you start down the road of stating a SHOOTER can't dictate how fast he fires a weapon you just kicked the fugking door wide open to an outright ban on semi-autos.
Clark
