Some people criticize Glock for using this arrangement, but I think it's pretty wise. Gives you the freedom to use something other than Trijicon.
Fool-proofing serves only one purpose: identify bigger fools.
"Necessity is the plea for every infringement of human liberty. It is the argument of tyrants; the creed of slaves."-William Pitt the Younger
"Spes Mea in Deo Est"--My hope is in GOD
The antidote for fifty enemies is one friend.--Aristotle