Obsidian Arms M16 Bolt Carrier Group BCG 5.56 Phosphate Black OA-M16-BCG-P-556-N. 56 bolt. Specifications for Obsidian Arms M16 Bolt Carrier Group (BCG): Manufacturer: Obsidian Arms Color: Black Finish: Phosphate Fabric/Material: 8620 Steel Caliber:...
Obsidian Arms M16 Bolt Carrier Group BCG 5.56 Phosphate Black OA-M16-BCG-P-556-N. 56 bolt. Specifications for Obsidian Arms M16 Bolt Carrier Group (BCG): Manufacturer: Obsidian Arms Color: Black Finish: Phosphate Fabric/Material: 8620 Steel Caliber:...