CMMG Mil-Spec M16 Bolt Carrier Group for 5.56 NATO/.223, Phosphate Finish, Chrome-Lined 55BA419

Product Description

The CMMG 55BA419 complete bolt carrier group is a Mil-Spec M16-style BCG designed for reliable function in 5.56x45mm NATO/.223 Remington platforms. Built with a 9310 steel bolt, 8620 steel carrier, and a 4140 steel extractor, this assembly features a durable phosphate finish and a chrome-lined carrier for long-lasting performance and easier maintenance. It’s an ideal replacement or upgrade bolt carrier group for AR-15/M16 upper assemblies.

Product Highlights

• Complete Mil-Spec M16 bolt carrier group for dependable cycling and consistent reliability
• 9310 steel bolt and 8620 steel carrier for strength and durability under high round counts
• Chrome-lined carrier helps resist wear and simplifies cleaning
• Phosphate finish in black for classic Mil-Spec corrosion resistance
• Compatible with M16/AR-15 pattern rifles chambered in 5.56 NATO/.223 (and commonly used with 300 BLK setups that use standard 5.56 bolts)

Specs

• Brand: CMMG
• Manufacturer Part Number: 55BA419
• UPC: 852005002431
• Caliber: 5.56x45mm NATO / .223 Remington
• Platform/Model Compatibility: M16 / AR-15 pattern
• Bolt Material: 9310 steel
• Carrier Material: 8620 steel (chrome-lined)
• Extractor Material: 4140 steel
• Finish: Phosphate (black)
• Weight: 0.8 lb
• Country of Manufacture: United States

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