The gun still has the stock plastic “sights” (it should be a law that you must put that word in quotation marks when referring to disposable plastic aiming nubbins) but things turned out all right.Since Day One, Glocks have come from the factory with little plastic things that technically qualify as "sights" only due to the position they occupy atop the slide. They are frequently the first things replaced on the gun, sometimes because the owner wants to and sometimes because they have no choice.
Take my second Glock 23, for instance: I was using it in a casual action pistol match, one stage of which involved engaging a couple of close targets weak-hand-only around one side of a barricade, then reloading behind the barricade, leaning out around the other side, and engaging three pepper poppers at longer ranges.
*BANGBANGBANGBANG* I shot up the first set of targets and pulled the gun back behind cover, jammed in a full mag, rolled out around the other side, and... found myself having a hard time picking up the front sight. Not due to any lack of visual acuity, but because it didn't seem to be there anymore. I managed to get the seven-yard popper just by pointing the gun at it and squeezing off a couple rounds, but without the front sight, the 10- and 25-yard targets might as well have been on the moon as I futilely pumped the remaining eleven rounds into the berm. This will affect your score.
As it turns out, in my haste to get on with the stage I had banged the top of the slide against the barricade, and without really noticing, at that. I was finally able to pick up my front sight... out of the dirt a couple feet in front of the firing line. That made me a believer in putting more better sights on the gun right there.