It is possible to tune a Glock's slide velocity like is commonly done on 1911's and 2011'sWould changing my factory rod guide over to a Tungsten Guide Rod actually make a noticeable difference in muzzle flip on my G23 Gen4?
I can only go by personal experience. Let's say a tungsten guide rod is 3000 times heavier than a plastic guide rod and a stainless steel guide rod is only 2000 times heavier. From my personal experience. when I switched from a plastic guide rod to a stainless steel guide rod, I experienced absolutely ZERO difference in muzzle flip, so I would speculate that a tungsten guide rod which is a lot heavier than a plastic guide rod but not that much heavier than a steel one, would not result in much difference at all in muzzle flip and if it does, my guess is that the result's would most likely be more psychological than physical but I can't say that for certain.Would changing my factory rod guide over to a Tungsten Guide Rod actually make a noticeable difference in muzzle flip on my G23 Gen4?
It’s definitely there. Time yourself with the centerfire round and then with a .22 version of the same gun.I'm probably not the best person to ask since after shooting magnum handguns for years, I don't think ANY Glock has any muzzle flip worth even mentioning.