Every assembled Glock 19 slide ships fully built and range-proven. First, we machine it from 17-4 stainless. Then we cut direct RMR or MOS – no plates. After that, we finish in nitride, DLC, or Cerakote. Next, we install match barrel, internals, and tall sights. Finally, we test-fire and ship the same day. Consequently, when your assembled Glock 19 slide arrives, you simply drop it on and go run it hard.