LBE Unlimited AR Bolt Carrier Group - Steel BCG Kit AR-15/M16

The LBE Unlimited ARBLTKT AR Bolt Carrier Group delivers reliable cycling performance for AR-platform rifles at an accessible price point. This complete steel bolt carrier group provides the essential components needed to build or upgrade an AR-15 or M16-style rifle. Built to military specifications, this BCG handles standard .223 Remington and 5.56x45mm NATO ammunition with consistent extraction and ejection.

What Makes This Different

This bolt carrier group features a properly staked gas key and phosphate coating for corrosion resistance. The bolt extension includes eight locking lugs machined to precise tolerances for proper headspace and timing. Unlike basic commercial BCGs, this unit includes a properly heat-treated bolt with chrome-lined interior surfaces that resist carbon buildup during extended firing sessions.

Key Features

• Complete bolt carrier group with bolt, carrier, gas key, cam pin, and firing pin
• 8620 steel construction with phosphate finish for durability
• Properly staked gas key prevents loosening under recoil
• Chrome-lined bolt extension reduces maintenance requirements
• MIL-SPEC dimensions ensure compatibility with standard AR-15/M16 receivers
• Heat-treated bolt withstands repeated firing cycles
• Standard weight design maintains proper timing with carbine and rifle-length gas systems

Field testing demonstrates reliable function across temperature ranges from -20°F to 140°F. The phosphate coating resists corrosion in humid environments while the chrome lining simplifies cleaning after high-volume shooting sessions. Competition shooters report consistent extraction with both brass and steel-cased ammunition. The bolt face maintains proper contact with case heads, preventing extraction failures that plague lower-quality alternatives.

Technical Specs

• Material: 8620 steel construction
• Finish: Phosphate coating with chrome-lined bolt extension
• Compatibility: AR-15, M16, and compatible platforms
• Caliber: .223 Remington/5.56x45mm NATO
• Gas key: Properly staked Grade 8 screws
• Bolt lugs: Eight-lug design with proper timing
• Weight: Approximately 11.5 ounces complete

This bolt carrier group provides the foundation for a reliable AR-platform rifle without premium pricing. The combination of proper materials, correct dimensions, and quality control makes it suitable for both recreational shooting and professional applications.