St. Croix Tactical Bolt Carrier Group Phosphate .223/5.56
This is a new Phosphate Coated St. Croix Tactical BCG for a .223/5.56 rifle.  This is a great upgrade!  The product specs are - Phosphate coated, 9310 Steel, MPI Bolt (Magnetic Particle Inspected), Shot Peened Bolt, Chrome Lined Carrier (Auto), Chrome Lined Gas Key, Grade 8 Hardened Fasteners, Key Staked per Mil-Spec, Black Extractor Insert, and Crane O-Ring. For more information on this product or company please check out the St. Croix Tactical Solutions website.