Complete FCG Parts Kit for Super Safety & Arc-Fire Trigger Systems This kit includes all the Fire Control Group (FCG) components needed to properly install and run a Super Safety or Arc-Fire trigger. Designed specifically for builders using cassette-style triggers, this is the complete parts package for your trigger upgrade. Kit Includes: Precut Super Safe / Arc-Fire FlatTrigger Hammer Disconnector Disconnector Spring Hammer Spring Trigger Spring Hammer / Trigger Pins Note: Does not include the Super Safety or Arc-Fire trigger itself.