Toolcraft 350 Legend Bolt Carrier Group w/ C158 Bolt - Black Nitride

Toolcraft 350 Legend Bolt Carrier Group w/ C158 Bolt – Black Nitride

The Toolcraft 350 Legend Bolt Carrier Group w/ C158 Bolt – Black Nitride is a premium-grade BCG crafted specifically for AR-15 rifles chambered in .350 Legend. Built to full-auto M16 specifications, this assembly includes a C158 Carpenter steel bolt and an 8620 steel carrier, both U.S.-sourced for superior strength and consistency. The black nitride finish is applied via a thermochemical diffusion process that enhances surface hardness, wear resistance, and corrosion protection while preserving a low-luster, blacked-out appearance.

Each component in this Toolcraft 350 Legend Bolt Carrier Group w/ C158 Bolt is selected for durability and reliable operation. The bolt is MPI-inspected and constructed of high-strength C158 steel. It includes a shot-peened extractor made from 4140 steel, three mil-spec gas rings, and a mil-spec O-ring system for consistent break-in and cycling. The cam pin is also made from 8620 steel, adding rugged durability to each cycling stroke. The firing pin is crafted from 416 stainless steel and delivers consistent ignition performance throughout extended shooting sessions.

The black nitride process chemically modifies the surface of the metal at a molecular level—increasing lubricity and hardness without adding coatings that can flake or chip. This bonded treatment provides long-lasting protection against corrosion and wear, and its low-friction surface makes cleaning easier and reduces carbon buildup. For users transitioning between suppressed and unsuppressed systems, the black nitride Toolcraft 350 Legend BCG supports reliable function with minimal lubrication in diverse environments.

Toolcraft is recognized as a trusted OEM producer for U.S. military and commercial firearms manufacturers, known for consistent quality control and American-made engineering. Purchased through Arm or Ally, this Toolcraft 350 Legend Bolt Carrier Group w/ C158 Bolt retains the manufacturer’s no-questions-asked lifetime warranty—covering all functional and finish issues. It is important to note that coatings applied by unauthorized third parties void this warranty, ensuring authenticity and support via authorized dealers.

Whether you’re building a lightweight hunting upper, a duty-ready carbine, or a competition-grade AR in .350 Legend, this Toolcraft 350 Legend Bolt Carrier Group w/ C158 Bolt – Black Nitride delivers exceptional performance. Its combination of mil-spec materials, military-grade finish, and lifetime protection make it a top-tier choice. Clean, corrosion-resistant, and American-made, this BCG provides the foundation for reliable function and minimal maintenance across all 350 Legend AR applications.