The Aim Arm Slide Parts Kit online can be bought from the marketing site of Aim Arms. The Kit includes all the necessary Gen-3 parts for a functional Glock upper assembly which does not contain any slides, sights, or barrel. The slide parts are brand new and machined to precise specifications. These are 100 percent worth buying. It is also perfect for the GLOCK Armorer's Kit. The features of this Arm Slide Part include the complete frame upper parts kit of 9MM pistol ammo. A spring slide cover plate, a depressor plunger spring, and the spring-loaded bearing are also attached to the Slide Parts. These Arm Slide Parts are compatible with the Polymer80 Frames.