The Trijicon and Meprolight front sights currently being installed by Glock are staked on, like the plastic sights. The replacement front sights like the Trijicon that I just received from Brownell's are attached with a hex screw. If one uses the recommended 271 Loctite, it won't come off.
[This message has been edited by WalterGAII (edited March 16, 2000).]