WHAT DOES HOW DO I BUY A GOCK 30 GEN 4 ONLINE MEAN?

I'm not sure if there is A great deal I can do to enhance on it but, when there is I want some Concepts from Those people of you that have modified their pocket tanks. In addition to night sights which is an apparent update within the regular glock sights. Thanks beforehand.For my part, better than inventory. The result in bar continues to be facto