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

I put a Tarran Tactical package right into a gen 3 g23 and It is now super lite but I nonetheless couldn't hit anything with it. My Close friend could shoot it very well but I struggled. Finally I improved the stock sights to the Dawson Precision Mounted Competition Sight Set and now I do very good with it.I'm WELL conscious that the use of the “