LBE Unlimited ARBCASY Mil-Spec AR-15 Bolt Catch Assembly Black Steel

The LBE Unlimited ARBCASY AR Parts Mil-Spec Bolt Catch Assembly delivers reliable bolt hold-open functionality for AR-platform rifles. This precision-machined component ensures consistent last-round bolt hold and smooth manual operation during tactical reloads.

What Makes This Different

Machined from high-grade steel with a durable black finish, this bolt catch assembly meets military specifications for dimensional tolerances and material strength. The component features proper spring tension calibration and precise engagement surfaces that outlast standard polymer alternatives. Heat-treated construction provides enhanced wear resistance under high-volume shooting conditions.

Key Features

• Mil-Spec dimensions ensure drop-in compatibility with all AR-15 and AR-10 lower receivers
• High-carbon steel construction with black oxide finish resists corrosion and wear
• Precision-machined engagement surfaces provide consistent bolt lock-up
• Heat-treated components maintain spring tension through extended use
• Includes bolt catch, plunger, and spring for complete assembly
• Compatible with standard AR-platform magazine followers
• Professional-grade manufacturing meets SAAMI specifications

Field testing demonstrates reliable function across temperature extremes from -20°F to 140°F. The assembly maintains proper engagement force through thousands of cycling operations, making it suitable for competitive shooting, law enforcement duty use, and tactical applications. The black oxide finish provides corrosion resistance in humid environments while maintaining low visibility profiles.

Technical Specs

• Material: High-carbon steel with black oxide finish
• Compatibility: AR-15, AR-10, and compatible platforms
• Dimensions: Mil-Spec per TDP requirements
• Finish: Black oxide coating
• Package includes: Bolt catch, plunger, spring
• Manufacturing: CNC machined to SAAMI standards
• Weight: 0.8 oz complete assembly

This bolt catch assembly represents a cost-effective upgrade for builders seeking mil-spec reliability without premium pricing. The steel construction and precision manufacturing ensure long-term performance in demanding applications where component failure is not acceptable.