HOW DO I BUY A GOCK 30 GEN 4 ONLINE THINGS TO KNOW BEFORE YOU BUY

I am undecided if there is Substantially I can perform to improve on it but, if there is I want some Concepts from People of you who may have modified their pocket tanks. In addition to night sights which is an apparent update within the standard glock sights. Many thanks upfront.My guess would be that the Gen4 G36 is still a means absent consideri