[ILLusion]

MadMax once did some empirical tests that showed that the Systema silent head set provided a significant reduction in impact to the gearbox compared to stock. The Angel, however, provided unparalleled impact reduction to the gearbox.

The design of the Angel head is much different than any other piston head - rather than use a convex or nippled surface like Systema/Guarder silent head sets, it used a soft rubber concave suction cup that had a diameter less than the cylinder wall. Behind it sat the ventilated polycarbonate piston head. On impact, the suction cup makes initial contact and contain most of the impact in the materials and through the structure.

The result is a very unique and rather quiet sound signature - moreso than a Systema silent head set on a KM cylinder head. I concur with HaZarD SFD's statement in that it may cause a reduction in velocity, although this is dependent on what your cylinder to inner barrel ratio is. If you are already pushing your cylinder to its volume limits, you will see this velocity reduction greater than if you were at the bottom end of its scale.