LanTac Enhanced BCG Features The Lantac USA Enhanced Bolt Carrier Group is machined from 8620 steel and heat treated then hard turned and ground after treatment to hold tight tolerances throughout the carrier. The bolt is manufactured from Carpenter 158 or 9310 steel shot peened and magnetic particle inspected to catch any flaws before it ever reaches a rifle. Unique shrouded forward-facing gas ports resize how gas is vented compared to a standard carrier resulting in a flatter running system with a smoother energy pulse and a softer start to carrier movement. That redesigned gas flow also runs cooler and cleaner while reducing pressurization in the upper receiver which matters when running a suppressed barrel. The entire carrier assembly wears a QPQ nitride finish in black a specialized nitrocarburizing process that creates a hard smooth surface with increased corrosion resistance and a low coefficient of friction. A patented domed cam pin machined from 17-4PH stainless steel and hardened to roughly 45 Rockwell C further reduces wear inside the upper receiver for smoother long-term operation. The flared boss at the tail of the carrier improves its lock position within the upper contributing to a measurable accuracy improvement. At 11.7 ounces and backed by a lifetime warranty this Lantac USA Enhanced BCG is available for sale at GrabAGun for 6mm ARC shooters who want a stronger smoother more reliable bolt carrier group. LanTac Enhanced BCG Specifications Manufacturer: LanTac Model: Enhanced BCG Caliber: 6mm ARC Color: Black Material: Stainless Steel Finish: Nitride Style: Full Auto Weight: 11.70 oz Available At: GrabAGun