Hi all, I just got a brand new G19 gen 2, made around 1989 according to SN letters, this gun is awesome. I was searching in the internet and discovered that back in 92 Glock made an "upgrade" of six parts: Extractor, Spring-loaded bearing, Firing pin safety and spring, Firing pin / striker and Trigger bar. I called Glock and they told me that they can upgrade it for free but i have to send it overnight throughout Fedex or UPS to Smyrna or i can go to a gssf tournament and they can upgrade it there. My questions are: are this upgrade really necessary. Can any Glock armorer do it and what would be the cost. i am in Fairfax County in Northern VA Thank you all for your help.