There's nothing wrong with that head. All the cutting surfaces are on the leading edge of the the blades. The fact that the blades are offset have nothing to do with the cutting planes, and it looks like the blades might lock into the deployed position as well.
Big Al's "Take-Em" Style Silhouette Decoys Pro-Staff.
Thanks for the info, hard to tell from small pictures, looked like the front of that head had cutting surfaces then the blades come out at an angle. I never thought about the regulations too much, never tried anything that different from a typical fixed blade or mech.