This Chester County Armory listing is for a Colt factory original full auto fire control group for a Colt M231 Firing Port Weapon, originally designed for operation in the Bradley Fighting Vehicle. We currently have multiple sets of these available. These fire control groups are all in new, unused, and uninstalled condition. A single kit includes all parts seen in the photo. Please call us with any questions. For more information on this listing or to view our other NFA and investment grade firearms, please visit our website at www.chestercountyarmory.com, or contact us via the information listed below. Chester County Armory West Chester, PA email: [email protected] phone: 610-235-6155 www.chestercountyarmory.com