The CCM Autococker Threaded Barrel Kit includes: 7 polished black aluminum sizers, .675/.677/.679/.681/.684/.687/.690. and a 10" aluminum AC threaded barrel and barrel case. The sizers and barrel have been designed to fit autococker style markers only. CCM products carry a LifeTime Workmanship Warranty. This warranty applies only to the original purchaser and is NON-TRANSFERABLE. This warranty does not apply to items that have been abused, misused, modified or repaired.