Grey Ghost Precision Version 5 Pistol Slide w/ RMR-DP Pro Cut Glock 17 Gen 5 17-4 Stainless Steel Sniper Grey Cerakote GGP-17-5-OC-SG-V5. They are machined from 17-4 Billet Stainless Steel to have tighter tolerances than a factory slide. They are Black...