Instructions
Locate a licensed gun dealer in your area and ask them whether they have any used Glocks for sale.
Locate the safety lock on the side of the Glock and push it with your finger to ensure that is slides easily, but locks firmly into place without slipping out.
Examine the overall surface appearance of the Glock and look for pitting or dimpled areas and rust. Do not purchase guns that have evidence of these defaults. It is fine if the gun is slightly worn or scratched, as these affect the appearance of the gun only.
Assess how the handle of the Glock feels in your hand. It should mold well to your fingers and you should not really notice the grip when it is the right size. If the Glock feels uncomfortable or bulky, try holding a different model until you find one that feels right.
Hold the gun up as if you are firing it and look down the barrel through the sight. The barrel should be perfectly straight and not lean up, down or to the side, which is the result of being bent. In addition, make sure that the site is not chipped or broken.
Take the gun out to a firing range, if possible, and test it to see if it fires straight. Most gun dealers also have a firing range so that clients can test the weapons.
Ask the gun dealer if they provide a warranty on the used Glock and what the warranty covers.