I have been to the Glock Head Quarters three times...

I have been to the Glock Head Quarters three times to have Glocks worked on. I have also shipped glocks to them to work on. Every time the gunsmiths have been extremely polite, professional and replaced all of the internal parts in my guns, replaced my old magazines and they have done it quickly. Glock has the best customer service of any gun company in my humble opinion.