The gun must be cocked before your first shot and when you pulling the trigger, The sliding motion is very critical. A high quality slide make your shooting more smooth. PTS licensed by famous American Brand : Battlecomp, Unity etc. Make up the decent external shell of airsoft gas pistol. Upgraded variants of this part can increase the durability of the airsoft handgun. Moreover, Airsoft Slide features here will change the aesthetic appearance of your handgun as well.