Proudly made in the USA! Glock 17 Gen 3 Compatible Handgun Slides with Trijicon RMR base pattern cut slide. Serrations on the front improve the performance of your Gen 3 Glock 17 and are perfect for building with the Polymer80 frames. Manufactured out of 416 Stainless steel. They feature an attractive Black DLC Finish. Optic thread pattern is 6-32 x 3/8. A black polymer RMR cover plate is included.