Product Detail
AB Arms Pro 5.56 BCG with Nickel Boron Coated Bolt
AB Arms AB Pro 5.56 Hybrid Bolt Carrier Group is built to Mil-Spec dimensions. The Nickel Boron coated bolt and cam pin needs virtually no lube during use. The phosphate coated extractor has a surface finish that provides superior extraction during firing. The Nitride QPQ coated carrier has a tough as nails finish that drastically enhances wear characteristics and provides surface lubricity.