Hello, Relatively new forum member here. I've searched high and low online for this info but can't find anything definitive. The rear sight screw on my Truglo sight has the hex portion stripped / rounded out and I can't remove it with the wrench. I can drill it out but I don't know what exact...

My new G19 Gen4 has always hit about 4" low @ 15 and 20 yards. Approximate measurements. That got me curious bc I'm usually a decent accurate marksman. Searching through the forums, I found that the standard height of the rear sight on this handgun is 6.5. The factory installed one on mine is...