If it's the gun, Glock makes several different rear sight heights to correct it. With the plastic sights, you should be able to change them with no tools - I have pushed them in and out with my fingers before.
The person who has nothing for which he is willing to fight, nothing … more important than his own personal safety, is a miserable creature [with] no chance of being free unless made and kept so by the exertions of better men …. John Stuart Mill
Last edited by Bren; 02-08-2013 at 06:00..