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