Arm or Ally 5.56 NATO / 223 Rem Bolt Carrier Group - Black Nitride

Arm or Ally 5.56 NATO / 223 Rem Bolt Carrier Group – Black Nitride

The Arm or Ally 5.56 NATO / 223 Rem Bolt Carrier Group (BCG) is engineered for reliability, durability, and superior performance. Precision-ground and properly heat-treated, this full-auto M16 BCG is 100% made in America using the finest U.S.-sourced raw materials. Whether you’re upgrading an existing rifle or completing a new build, this BCG is designed to withstand rigorous use while delivering consistent functionality.

The Black Nitride finish significantly enhances the BCG’s performance by increasing surface hardness, preventing corrosion, and improving wear resistance. Unlike coatings that can chip or flake, the nitride treatment bonds at a molecular level, ensuring a long-lasting, low-friction surface. The added lubricity of the finish reduces fouling buildup, making cleaning and maintenance easier compared to traditional phosphate-coated BCGs.

As a company that has handled hundreds of thousands of bolt carrier groups since 2015, we know what makes a high-quality BCG. Having been a leading dealer of Toolcraft BCGs, we have built strong relationships with top-tier U.S. manufacturers, hand-selecting each component for this BCG based on strict quality and performance standards. By eliminating unnecessary branding and premium packaging, we offer a best-in-class bolt carrier group at an exceptional price.

If you’re looking for a dependable and high-performance BCG, trust the expertise of Arm or Ally to deliver a product that exceeds expectations. Upgrade your rifle with confidence, knowing that this BCG is built to last.

Features:

• 100% made in the USA using premium raw materials
• Full-auto M16 profile for enhanced strength and durability
• Precision-ground and properly heat-treated components
• Black Nitride finish for superior hardness, corrosion resistance, and lubricity
• No coatings to chip or wear—nitride is bonded at the molecular level
• Hand-selected components from top U.S. manufacturers
• Backed by Arm or Ally’s expertise in high-quality BCGs