Q LLC ACCARBCG2PC Bolt Carrier Group 5.56/.223 Black Nitride AR-15

The Q LLC ACCARBCG2PC Bolt Carrier Group delivers enhanced reliability and extended service life for AR-15 platform rifles. This precision-machined BCG combines stainless steel construction with black nitride coating to resist corrosion and reduce friction during high-volume shooting sessions.

What Makes This Different

Unlike standard mil-spec bolt carrier groups, the ACCARBCG2PC features stainless steel construction throughout the bolt and carrier assembly. The black nitride finish provides superior hardness compared to phosphate coatings, measuring 65-70 HRC on the surface. This combination reduces wear on critical contact points and maintains headspace consistency over thousands of rounds.

Key Features

• Stainless steel bolt and carrier construction for enhanced durability
• Black nitride coating resists corrosion and reduces friction
• Full-auto rated bolt carrier design for reliable cycling
• Precision-machined gas key properly staked and sealed
• Compatible with 5.56x45mm and .223 Remington chambers
• Standard AR-15 bolt extension and cam pin configuration
• Includes bolt, carrier, gas key, cam pin, and firing pin retainer

Field testing demonstrates consistent extraction and ejection across various ammunition weights and powder charges. The stainless steel construction maintains dimensional stability under rapid-fire conditions, while the nitride coating reduces cleaning time between shooting sessions. Competition shooters report reliable function through extended courses of fire without lubrication breakdown.

Technical Specs

• Caliber: 5.56x45mm NATO/.223 Remington
• Material: Stainless steel with black nitride finish
• Bolt extension: M16/AR-15 standard profile
• Gas key: Properly torqued and staked per mil-spec
• Bolt face: M4 feed ramp compatible
• Headspace: SAAMI specification tolerance
• Manufacturer: Q LLC
• Part Number: ACCARBCG2PC

This bolt carrier group represents a significant upgrade over standard phosphate-coated assemblies for serious shooters who demand consistent performance. The stainless steel and nitride combination extends service intervals while maintaining the reliability that AR-15 platforms require.