I had the same thing happen when I bought a Trijicon front sight. I have a friend who owns a Glock 23 so I borrow what appeared to be the 'Glock tool'. Come to find out, that's not it. I ended up taking the gun to a gunsmith. Paid $5.00 which is a whole lot less than buying the tool.[b said:Quote[/b] (32ndgeorgia @ Jan. 14 2006,12:19)]Got my HiViz fiber optic sight and went to install it. What a surprise. You have to have a Glock Front Sight Tool/wrench to tighten the screw. So now I have to buy one of those. I am not happy.