New AIM 2S (Double Serrations) Glock 19 Gen 3 Compatible Handgun Slides with Trijicon RMR base pattern cut slide. Serrations on the front improve the performance of your Gen 3 Glock 19 and are perfect for building with the Polymer80 frames. Manufactured out of 8620 carbon steel and Nitro Carburized for hardness. They feature an attractive Black Nitride finish. Does not include optic cut cover plate OR Trijicon RMR.