L2D Combat Complete Catalyst Upper Non-Threaded Glock 17 Gen 3 Black/Black LD-CU-C-173-F-BLK-BLK. The Complete Catalyst Upper Kit Includes: (QTY 1) L2D Combat Catalyst 17 Gen 3 Slide RMR Ready w/ Mounting Hardware & RMR Cover Plate (QTY 1)L2D Combat...