THE BASIC PRINCIPLES OF WHERE CAN I BUY A GLOCK 30 ONLINE

My 2nd G30SF also experienced accuracy challenges as well as WORST bring about pull of ANY Glock I have ever owned, And that i couldn't correct it applying this setup regardless of what I did and well over 1,000 rounds of attempting to repair it and “split in” the gun (which I have NEVER had to do with any Glock before either).Most likely a dum