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

My next G30SF also had precision issues plus the WORST cause pull of ANY Glock I have at any time owned, and I could NOT correct it working with this set up regardless of what I did and well above one,000 rounds of trying to resolve it and “crack in” the gun (which I have not needed to do with any Glock just before either).I am Very well knowle