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

My 2nd G30SF also had accuracy problems as well as WORST result in pull of ANY Glock I have at any time owned, And that i couldn't correct it employing this set up regardless of the I did and very well above one,000 rounds of seeking to resolve it and “split in” the gun (which I haven't had to do with any Glock right before either).It really is