Originally Posted by jaxon1023
Mine didn't come with night sights
Hmm. . . usually, GNS stands for "Glock Night Sights".
Not all of the guns with the same prefix will have the same options. The listed prefix is just one example of a gun with that prefix. It just helps give an idea of what Glock was doing at the point in time that the prefix was issued.
Glock Certified Armorer