Groo here
I have a number of ported guns one is an Sp101 with the 4 port system
also..
The porting does not reduce the kick of the gun but does reduce the
rotation ,, this will lessen the kick in the web of the hand.
As to the flash-- some shooters are spoiled --- when I started
shooting seriously the 357 could light up the range like a flashbulb..
We just learned not to look at the flash but at the target [ like you
do to see the front plate on at car at night]
With the Rem express you really did not need a light after the first
shot as the flash would light the target ,sights, backstop, and most
everything else!!!!!!!!!!!!!!!!