I installed an upgrade kit in my Gen 2 G19 from Glock. I think you should be good to go.
Where can you purchase the upgrade kit? I heard Glock only sells OEM parts to gunsmith's?
I'm an Glock armourer so they provided me the kit directly, I think the only real things to change are the extractor? other than that? I think that, any Gen 3 stuff will work.



























