I picked up a new Glock 32 w/ night sights on my lunch break today, took it to work (an indoor range) and put 300 rounds through it. The sights seem to be set up for a 6 o'clock hold (its about 4 inches high at 15 yards) and I prefer POA. The markings on both the front and rear sights are MH3. I'm not familiar with glocks, but on my Sig, the markings indicate which size it is. Is it the same for the glocks? My question is which size do I have, what size do I need, and where can I get it.