Guntec USA AR-15 Mil-Spec Bolt Carrier Group Cerakote Red. Our goal is to distribute excellent quality at an economical value. Specifications for Guntec USA AR-15 Mil-Spec Bolt Carrier Group: Manufacturer: Guntec USA Finish: Cerakote Fabric/Material: 8620 Steel Caliber: 5.56x45mm NATO Gun Make: AR Platform Gun Model: AR-15 Features of Guntec USA AR-15 Mil-Spec Bolt Carrier Group Grade 8 Screws To Mil-Spec 9310 Bolt MPI (Magnetic Particle Inspected) 1 Year Warranty Hydraulically Staked CL Key Heat Treated For Heavy Duty Use Package Contents: Guntec USA AR-15 Mil-Spec Bolt Carrier Group What firearm models does the manufacturer say Guntec USA AR-15 Mil-Spec Bolt Carrier Group is compatible with? The manufacturer says that Guntec USA AR-15 Mil-Spec Bolt Carrier Group is compatible with AR-15Guntec USA GT-BCG-CRED: AR-15 Mil-Spec Bolt Carrier Group Cerakote Red