The One Horse M16 Bolt Carrier Group 5.56/.300 BLK Nitride is built for shooters who want dependable function and long-term durability in an AR-15 or M16 platform. Using a 9310 tool steel bolt paired with an 8620 AQ steel carrier, this BCG is fully heat-treated to Mil-Spec standards and magnetic particle inspected for added confidence in material strength and quality. A salt bath nitride finish on the bolt, carrier, and cam pin enhances wear resistance, corrosion protection, and smooth cycling, while the properly staked gas key with Grade 8 fasteners helps keep the system sealed under hard use.

This model is compatible with 5.56/.223 and .300 Blackout setups, making it a versatile choice for general-purpose rifles, training carbines, or suppressed builds. Chamfered lug backs, an S7 extractor with spring, insert, and O-ring, and forward assist serrations all work together to support reliable extraction and easy operation. Full-auto profile compatibility means it drops into a wide range of AR-15 uppers, reflecting One Horse’s focus on practical, no-nonsense components backed by careful manufacturing.

Key Features:

• Manufacturer: One Horse
• Model: M16 Bolt Carrier Group 5.56/.300 BLK Nitride
• Caliber: 5.56/.223 and .300 Blackout
• Condition: New
• Action: Semi-Automatic Compatible, Full-Auto Profile
• Unique Features: 9310 Tool Steel Bolt, 8620 AQ Steel Carrier, Salt Bath Nitride Finish, S7 Extractor, Properly Staked Gas Key With Grade 8 Fasteners, Forward Assist Serrations
• Weight: 12 oz