rear sight question..

[mannyCA]

can anyone tell me some information about this rear sight? I think it should be good for extended ranges but I was curious if it was for any special competition or match shooting that anyone would recognize?
thanks,
Manny:wavey:

[DannyR]

t looks like the old style factory adjustable sight. The newer version does not extend beyond the end of the slide. Glock needed to gain more import points for their pistols, and the inexpensive adjustable sight gave them another point.