TacFire's Glock 23 compatible slide and barrel kit features a slide that is constructed of 416R stainless steel with a Cerakote graphite black finish, machined for fitment of Trijicon RMR, accepts Polymer80 frames, and includes slide cover plate with screws. The drop-in replacement barrel is made of 416R stainless steel with a nitride finish and is 4" long. This kit is compatible with Glock 23 Gen3 frames.