Mag Na Port has actual pattented shape to their ports, knock off immitations are just a generic hole or slot . Mag Na Port will have better ratio of muzzle flip reduction to gas diverted .
Mag Na Port is not only very good at porting , but also good at 'smithing or refinishing your gun , and producing small runs of custom guns.
Mag Na Port is competitive priced, and quick turnaround.
Added - In fairness, HybraPort also has scientifically designed pattented Port design .Hybra offers massive recoil reduction , but at expense of velocity loss, and major gas relocation. Different set of parameters and trade offs .
Ok.Ok you sold me on Mag Na Port. Lol. I visited their website and like what they offer so going to send out my S&W 629 classic 8 3/8" to have them port it. Thanks for input