Rosco Manufacturing ROS-BCG-001 Bolt Carrier Group 5.56/300 BLK AR-15 Melonite

Rosco ROS-BCG-001 Bolt Carrier Group for AR-15 pattern rifles. Melonite (nitride) finish. M16-spec full-auto rated carrier. Built for durability and long service life. Compatible with AR-15 platforms chambered in .223 Remington, 5.56 NATO, or .300 Blackout. Melonite finished 8620 carrier with 9310 steel bolt. Properly staked 4130 gas key and upgraded extractor. Gas key secured with Grade 8 hardware. Bolt details include 9310 bolt, 4340 cam pin, and 8740 steel firing pin. Suitable for 5.56 and 300 Blackout configurations.