Yeah you can just press that pin in and turn the sight. The magpul backup sights I bought came with an adjustment tool that works for the stock sights too. Its like a small key that you slip over the sight post and just turn it. Works great. Ill show a picture; f it if you want to know.
I tried a bore sight and it was way off. So I used a bore sighter to just get an idea of where I need my red dot and sights then fine tuned it using ammo. Not super crazy accurate but close enough to make me smile when I see my target.
I got it Thanks to help from Truggie Tex, overkill0084, Niteglock & a Buddie of mine that has a range, He also taught me how to properly use the aperture of the sights. Being in the military he showed me how he was trained to use the sight's. I myself Will admit that I had never used this type, Mine are all open old style so I was at fault for the gun shooting low. I apologised to my firearm and now I know, 52 and still learning
Way to used to the 1969 Winchester 30/30 model 94 with the octagon long barrel " Remember you will always be happy If you just go ahead and buy it"