The Name Rosco is Synonymous with Performance and Perfection

The Rosco Manufacturing 5.56 / 300 BLK Bolt Carrier Group is designed to meet the needs of the modern AR-15 shooter. Each BCG is full-auto rated with a tough and durable Melonite finish for long term durability and easy cleaning and maintenance. This critical part is built to military specifications with a properly staked gas key and a bolt which is shot-peened, magnetic particle inspected, and includes an upgraded extractor. Each component is crafted from carefully chosen materials to ensure they perform at the highest level possible with your rifle. Rosco Manufacturing balances input from military users and civilian shooters to deliver the best carbine components possible.

Rosco Manufacturing Bolt Carrier Group Specifications and Features:

• Rosco Manufacturing Item Number: ROS-BCG-001
• Complete Bolt Carrier Group
• Caliber: 5.56 NATO, .223 Remington, .300 AAC Blackout
• Full Auto Rated
• Carrier Material: 8620 Steel
• Gas Key: 4130 Steel, Attached with Grade 8 Hardware, Properly Staked
• Cam Pin: Hardened 4340 Steel
• Firing Pin: 8740 Steel, Mil-Spec, Center-Less Ground, Hard Chrome Coated
• Bolt Material: 9310, Properly Heat Treated, MPI/HPT
• Extractor: 4340 Steel
• Ejector: S7 Tool Steel
• Finish: Black Melonite

Fits:

• AR-15 Upper Receivers and Rifles chambered in 5.56/.223/.300 BLK