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

My second G30SF also experienced precision challenges and also the WORST set off pull of ANY Glock I've ever owned, And that i could NOT accurate it working with this setup no matter what I did and well about one,000 rounds of wanting to repair it and “split in” the gun (which I have NEVER had to do with any Glock ahead of possibly).Perhaps a d