Toolcraft 350 Legend Bolt Carrier Group - Black Nitride

Toolcraft 350 Legend Bolt Carrier Group – Black Nitride

The Toolcraft 350 Legend Bolt Carrier Group – Black Nitride is a premium bolt carrier assembly engineered for AR-15 rifles chambered in .350 Legend. This Toolcraft 350 Legend Bolt Carrier Group utilizes a black nitride finish that chemically alters the surface of the 8620 steel carrier, delivering enhanced hardness, wear resistance, and corrosion protection without adding a separate coating layer that could peel or flake.

This M16 full-auto BCG is precision-crafted from U.S.-sourced 8620 steel for the carrier and 9310 or C158 steel for the bolt, depending on availability. The bolt is MPI-inspected and features a shot-peened extractor made of 4140 steel, as well as three mil-spec gas rings and a cam pin also manufactured in 8620 steel. The firing pin is 416 stainless steel, and the gas key is machined from 4130 steel with Grade 8 fasteners that are properly staked to ensure gas system reliability.

The black nitride finish on this Toolcraft 350 Legend Bolt Carrier Group results from a thermochemical process that increases surface hardness and lubricity while resisting corrosion and improving edge retention. Unlike phosphate coatings, black nitride does not require heavy lubrication or produce dust and promotes smoother cycling and easier cleaning—ideal for both suppressed and unsuppressed shooting sessions.

Toolcraft is recognized as a trusted OEM supplier for military and commercial firearm manufacturers, known for high-quality, American-made components. When ordered through Arm or Ally—Toolcraft’s authorized stocking dealer—this Toolcraft 350 Legend Bolt Carrier Group retains the manufacturer’s no-questions-asked lifetime warranty. Units refinished by third parties are excluded from warranty coverage, so authentic sourcing ensures peace of mind.

Whether building a tactical patrol rifle, a deer hunting AR in .350 Legend, or a competition upper optimized for low recoil, this Toolcraft 350 Legend Bolt Carrier Group – Black Nitride offers unmatched durability, reliability, and performance. This BCG delivers all the benefits of modern surface engineering combined with mil-spec materials and lifetime protection, serving as a top-tier foundation for serious rifle builds.