Ruger GP 100 sight questions

The front sight is easily changed on a GP-100. The front of the barrel is a compression screw under spring pressure that you push in and lift off the front sight. Piece of cake!
 
The Williams Firesights have a good reputation, and you can easily check to see if you like the first one by putting a white stripe on your existing sight.

To remove the front sight, poke something in the small hole in the muzzle above the barrel and push against the spring pressure. The front sight will lift off.
 
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