The Lantac USA Enhanced Bolt Carrier Group (Lantac part number 01-UP-556-NIT-EBCG) is a .224/5.56 BCG built with M16-style mass for increased lock time, precision machined from 8620 steel with a shot-peened, magnetic-particle-inspected bolt made from Carpenter 158 or 9310 tool steel. The full carrier is QPQ nitride coated for a hard, smooth, corrosion-resistant surface with a low coefficient of friction. Lantac’s patented shrouded, forward-facing gas ports redirect gas differently than a standard carrier, which results in a flatter-running system with a smoother energy pulse and a softer start to carrier movement — and the carrier runs cooler and cleaner with less upper receiver pressurization when shooting suppressed. A domed head cam pin machined from hardened 17-4PH stainless steel rounds out the enhancements at the carrier’s most wear-prone contact point.

Key Specifications

• Chambered for .224 caliber / 5.56 NATO, matching standard AR-15 platform barrels.
• Built with M16-style carrier mass for increased lock time and smoother cycling on both semi-auto and full-auto lower profiles.
• The carrier is machined from 8620 steel, heat treated and hard turned and ground.
• The bolt is manufactured from Carpenter 158 or 9310 steel, shot peened and Magnetic Particle Inspected.
• Finish is QPQ Nitride coated, giving a hard, low-friction, corrosion-resistant surface.
• Patented shrouded, forward-facing gas ports redirect gas for a flatter, smoother-running cycle with less upper receiver pressurization when suppressed.
• The cam pin is Lantac’s CP-R360 domed design, machined from 17-4PH stainless steel and hardened to H900.
• The gas key is staked at four points with gasket sealer, and only Grade 8 hardened fasteners are used in assembly.
• Carrier weight is 11.7 oz, tuned specifically to help increase lock time.
• It is Made in the USA and backed by a lifetime warranty.

Frequently Asked Questions

Does this BCG run cooler when shooting suppressed? Yes, Lantac’s shrouded gas port design reduces upper receiver pressurization and helps the system run cooler and cleaner when suppressed.

What steel is the bolt made from? The bolt is manufactured from Carpenter 158 or 9310 steel, shot peened and Magnetic Particle Inspected.

What coating is used on this carrier? The full carrier assembly is QPQ Nitride coated for corrosion resistance and a low-friction surface.

Buy the Lantac Enhanced Bolt Carrier Group

Run your 5.56 AR-15 smoother, cooler, and cleaner with a bolt carrier group engineered around real gas-flow improvements, not just a coating change. Lantac’s shrouded port design and nitride finish add up to a genuinely enhanced BCG. Browse more of our AR bolt carrier group selection and order from our Lubbock, Texas gun shop for direct shipping as soon as it is ready to send.