Wilson Combat TRBCASBN556 Bolt Carrier Assembly 5.56 NATO Black Nitride

The Wilson Combat TRBCASBN556 Bolt Carrier Assembly delivers enhanced reliability and extended service life for 5.56 NATO AR-15 platforms. This premium bolt carrier group combines Wilson Combat's precision manufacturing with advanced materials engineering to provide consistent cycling performance under demanding conditions.

What Makes This Different

The black nitride coating on stainless steel construction provides superior corrosion resistance compared to standard phosphate-coated carriers. This surface treatment reduces friction while maintaining dimensional stability across temperature extremes. The stainless steel construction resists galling and wear patterns common in high-volume shooting scenarios, extending maintenance intervals significantly.

Key Features

• Stainless steel construction with black nitride coating for maximum durability
• Precision machined to Wilson Combat's tight tolerances for consistent headspace
• Enhanced gas key staking and sealing for reliable gas system operation
• Properly torqued and staked carrier key bolts to military specifications
• Compatible with all mil-spec AR-15 upper receivers in 5.56 NATO/.223 Remington
• Magnetic particle inspected bolt for crack detection and quality assurance
• Shot-peened bolt for stress relief and fatigue resistance

This bolt carrier assembly maintains consistent lockup and extraction across various ammunition weights and powder charges. The enhanced surface finish reduces carbon buildup, making field stripping and cleaning more efficient. Competition shooters benefit from the consistent timing, while duty users appreciate the extended service intervals between detailed cleaning cycles.

Technical Specs

• Caliber: 5.56 NATO/.223 Remington
• Material: Stainless steel with black nitride finish
• Bolt: 8620 steel, shot-peened and magnetic particle inspected
• Gas key: Properly staked and sealed to carrier
• Headspace: In-spec for mil-spec barrel extensions
• Compatibility: All mil-spec AR-15 upper receivers
• Manufacturer: Wilson Combat
• Country of Origin: USA

Wilson Combat's manufacturing standards ensure this bolt carrier assembly meets the demands of professional users while providing recreational shooters with enhanced reliability. The combination of premium materials and precision manufacturing justifies the investment for those requiring consistent performance from their AR-15 platform.