Faxon 5.56 M16 BCG TiN - Premium Titanium Nitride Bolt Carrier Group

Building a reliable 5.56 rifle starts with quality internals, and the Faxon 5.56 M16 BCG TiN delivers the precision and durability you need for consistent performance on the range or in the field. This titanium nitride bolt carrier group is engineered to mil-spec standards, ensuring compatibility with your existing AR-15 components while adding proven reliability enhancements. Whether you're assembling a new rifle or upgrading a tired BCG, Faxon's approach to hard-use parts means fewer malfunctions and longer service life.

The M16 profile makes this BCG equally at home in civilian semiauto builds and full-auto platforms, with serrations that work cleanly with your upper receiver's forward assist. Faxon machines the bolt carrier from 9310 tool steel—a material that handles stress and cycling wear better than lesser grades—then applies salt-bath nitride treatment for corrosion resistance and a harder working surface. The shop floor attention shows: magnetic particle inspection catches internal flaws before the part ships, and details like chamfered locking lugs reduce friction and wear during the firing cycle.

Assembly is handled for you: the BCG arrives with spring, insert, and Crane O-ring already installed, so you can drop it straight into your upper without tracking down small parts or wrestling with fitment. The all-black finish pairs with any upper you're running. If you're serious about building or maintaining a shooter you'll actually trust, this is where quality in the lower-visibility parts pays real dividends.

Key Features

• M16 profile compatible with full-auto lowers and civilian semiauto uppers
• Machined from 9310 tool steel, heat-treated and shot-peened to military specifications
• Salt-bath nitride treatment for enhanced corrosion resistance and surface hardness
• Chamfered rear locking lugs reduce friction and improve reliability
• Serrated for clean interaction with upper receiver forward assist
• Magnetic particle inspected to catch internal flaws
• Comes fully assembled with spring, insert, and Crane O-ring installed
• All-black finish

Specifications

Frequently Asked Questions

Will this BCG work with my AR-15 upper and lower?

Yes. The M16 profile is compatible with standard mil-spec uppers and lowers. The serrated design works with forward assist mechanisms on most uppers, and it will function in both civilian semiauto and full-auto lower platforms.

What's included, and do I have to install anything myself?

The BCG arrives fully assembled with the spring, insert, and Crane O-ring already installed. You can drop it straight into your upper receiver without any additional work.

Why does the finish matter for a BCG?

The salt-bath nitride treatment hardens the surface, making the bolt carrier more resistant to corrosion and wear from repeated firing cycles. It also reduces friction at the lugs, which contributes to smoother cycling and improved long-term reliability.

What does magnetic particle inspection mean?

Magnetic particle inspection is a quality-control process that detects internal flaws—cracks, voids, or material defects—that are invisible to the naked eye. Parts are magnetized and inspected to ensure they meet strength and reliability standards before shipping.