I am a Glock armorer, and have carried the 23s on the 21s. The 23s were one of the best duty pistols I carried in 20 years of L.E. including SWAT, and Tactical K-9. With 18 years of that as a weapons instructor I will say the laser has it's place, but I don't see it in a fighting pistol. I do however, heavily endorse the trijicon night sights, at least for the front sight, or both if you have the funds. jmtcw