OK guys, I have a G19/4, stock sights on it (ball in the bucket style). I am reading threads/blogs on accuracy, and inevitably people suggest changing the sights. Here are my questions to the group: 1. Will after market sights improve a shooter's ability to shoot accurately? 2. If so, why? What is so bad about the glock factory sights, and what makes the after-market sights better? 3. If you prefer a certain aftermarket sight for glock pistols, please tell us which one and why.