Rosco Manufacturing Melonite Bolt Carrier Group for 5.56 NATO & .300 Blackout AR-15 ROS-BCG-001

Product Description

The Rosco Manufacturing Melonite Bolt Carrier Group is built to MIL-spec standards for modern AR-style carbines chambered in 5.56 NATO / 5.56x45mm and .300 AAC Blackout. Designed with input from both consumers and military end users, this full-auto-rated BCG features a durable Melonite finish for enhanced wear resistance and corrosion protection. It includes a properly staked gas key and a matched, shot-peened bolt that is proof-tested and magnetic-particle inspected to support reliable lockup and consistent accuracy, especially when paired with Rosco barrel extensions.

Product Highlights

• Melonite-coated bolt carrier group for improved wear resistance and corrosion protection
• MIL-spec construction with a properly staked gas key for dependable cycling
• Full-auto rated design intended for demanding training, duty, and hard-use conditions
• Matched bolt is shot-peened and MPI/HPT tested to enhance strength and service life
• Upgraded extractor and quality component steels support consistent extraction and ejection

Specs

• Brand: Rosco Manufacturing
• Product Type: Bolt Carrier Group (BCG)
• Compatibility: 5.56 NATO / 5.56x45mm and .300 AAC Blackout (AR-15 platform)
• Finish/Coating: Melonite (Black)
• Carrier Material: 8620 steel
• Bolt Material: 9310 steel; properly heat treated; shot-peened; MPI/HPT tested
• Gas Key: 4130 steel; Grade 8 hardware; properly staked
• Cam Pin: Hardened 4340
• Firing Pin: 8740 steel; Mil-Spec; centerless ground; hard chrome coated
• Extractor: 4340 steel
• Ejector: S7 tool steel
• Manufacturer Part Number: ROS-BCG-001
• UPC: 181969500821

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