Nighthawk Custom's Drop-In Series slide stop offers shooters a durable, reliable upgrade for any 1911 pistol. Fully Machined from a premium-grade 416 stainless steel billet, this 9mm caliber slide stop is designed to withstand the rigors of repeated use over a long service life. Blued to further increase the service life, our slide stops offer reliable lock back on empty every time. With the incredible force absorbed on each lock back of the slide, Nighthawk Custom offers only the highest quality drop-in slide stops to meet and exceed the expectations of our customers. May require minor fitting.FeaturesFully machined from billet materialFor Use With 9mm or .38 Super