DV8 Dynamics just showed off a new concept that they are currently developing in conjunction with another party who owns patents specific to this design and function.
The Rocket-Brake which is designed to offer an extremely flat shooting muzzle under rapid fire.
The design of the face of the slide itself is designed to create a vortex effect which creates a downward force and with higher frequency of trigger pull effects increase.
The photos show one solid piece as the muzzle device is built integrally into the slide itself. no moving parts.
As soon as it goes live we will update with more information.