Toolcraft 350 Legend Bolt Carrier Group w/ C158 Bolt - Flat Dark Earth - DLC

Toolcraft 350 Legend Bolt Carrier Group – Flat Dark Earth – DLC

The Toolcraft 350 Legend Bolt Carrier Group, Flat Dark Earth – DLC is a full-auto M16-spec assembly tailored for AR-15 rifles chambered in .350 Legend. Built with a choice of 158 Carpenter or 9310 steel bolts and an 8620 steel carrier, this BCG is coated in Flat Dark Earth Diamond-Like Carbon (DLC). DLC offers extraordinary hardness—approximately 90 Rockwell—along with low friction, self-lubricating performance, and exceptional resistance to wear, corrosion, and carbon buildup.

This carrier group includes a mil-spec 4130 steel gas key secured by Grade 8 screws and properly staked to ensure reliable gas flow. The bolt, machined from 158 Carpenter steel or 9310 steel, is MPI-inspected and shot-peened for peak durability. It features a 4140 steel extractor with O-ring support, three mil-spec gas rings, a cam pin made of 8620 steel, and a 416 stainless steel firing pin—providing rugged operation across high-round-count environments.

The Flat Dark Earth DLC coating is bonded to the steel at a molecular level—never a flaky surface layer. This treatment reduces friction more than Nickel Boron, delivers excellent edge and wear resistance, and wipes clean of carbon with a dry patch. The BCG cycles smoothly with minimal lubrication and simplifies maintenance for suppressed or unsuppressed shooting platforms.

Toolcraft is a proven OEM supplier to U.S. military and commercial firearm manufacturers. This Toolcraft 350 Legend Bolt Carrier Group, Flat Dark Earth – DLC is exclusively sold by authorized dealers like Arm or Ally and is covered by Toolcraft’s lifetime warranty—guaranteeing finish and function. Units refinished by third-party coaters automatically void the warranty, so genuine sourcing is essential.

Ideal for hunters, competitive shooters, or tactical builders using .350 Legend, the Toolcraft 350 Legend Bolt Carrier Group, Flat Dark Earth – DLC offers premium performance, long-term durability, and easy upkeep. Its combination of modern surface engineering, mil-spec materials, and American craftsmanship makes it a standout upgrade for serious rifle setups.