Every mod you make to your Glock makes it less reliable

 

Pic is from Reddit.  He did a few things I wouldn't roll with but still an interesting looking weapon...

How many have heard the mantra that the more mods you make to your Glock the more unreliable it becomes?

I hear continuously.

No major issues with the thought, but I have to wonder.  A few mods would seem to make you (sorry for the buzzword) more lethal when the time of action comes.

Red dots can be considered a mod.  Flared magwells too.  Pistol lights?  I mean they don't come with the Glock out the store!

Some of this stuff is pure cosmetic.  Some of it should at least in theory make your gun run better.

I said all that to ask the community this (don't violate dept rules) what mods do you think are commonsense and worth pursuing?