Purchased in the course of an excellent sale, went with serrations only/no holes. This is really superior precision and removes complaints I've regarding the stock slide, Specifically with my aftermarket barrel and the GS tungsten manual rod. Humorous how so many of the end in capturing themselves within the groin. https://bookmarkhard.com/story14252879/the-fact-about-glock-43x-price-that-no-one-is-suggesting