Luth-AR Bolt Carrier Key Black. Developed using some of the most extremely durable and dependable resources around these Bolt Carrier Groups via Luth-AR offers you an item which will give you a great deal of consistency. Luth-AR has been making top quality products for a number of years and the Luth-AR AR Bolt Carrier Key is their approach to showing you exactly how much they care. Here at OpticsPlanet we ensure that it is our obligation to receive the perfect product for all your requirements and exhibiting the Luth-AR AR Bolt Carrier Key is a thing that we are delighted to offer. Specifications for Luth-AR AR Bolt Carrier Key: Manufacturer: Luth-AR Color: Black Finish: Manganese Phosphate Fabric/Material: 4130 Alloy Steel Caliber: .223 Remington Gun Make: AR Platform Gun Model: AR-15 Package Contents: Luth-AR AR Bolt Carrier Key What firearm models does the manufacturer say Luth-AR AR Bolt Carrier Key is compatible with? The manufacturer says that Luth-AR AR Bolt Carrier Key is compatible with AR-15Luth-AR BT-11: Bolt Carrier Key Black