Spike's Tactical ST5BG03 BCG 5.56 Nickel Boron

The Heart of Your Rifle

The bolt carrier group is arguably the most critical component in any AR-platform rifle. It must function reliably under demanding conditions, cycle thousands of rounds without failure, and maintain its integrity through years of use. The Spike's Tactical ST5BG03 is engineered to meet and exceed these demands.

Superior Nickel Boron Coating

This BCG features a premium nickel boron finish that provides several distinct advantages over traditional phosphate coatings:

• Enhanced Durability: Nickel boron resists corrosion and wear better than standard finishes
• Reduced Friction: The smooth coating minimizes drag and promotes reliable cycling
• Easy Maintenance: Cleanup is faster and easier with this slick finish
• Professional Appearance: The distinctive silver-gray finish looks as good as it performs

Complete Mil-Spec Components

Spike's Tactical includes all essential parts:

• Mil-spec bolt carrier
• Mil-spec extractor
• Mil-spec gas key
• Firing pin
• Cam pin
• Retaining pin

Full Auto Rated

This BCG is built to M16 specifications, meaning it's engineered for full-auto reliability. Even if your rifle is semi-automatic only, you benefit from the enhanced durability and precision of military-grade manufacturing.

Why It Matters

Don't compromise on this critical component. The Spike's Tactical BCG represents years of firearms engineering and real-world testing. It's the choice of serious shooters who understand that reliability isn't negotiable.