Toolcraft 458 SOCOM Bolt Carrier Group - Black Nitride

Toolcraft 458 SOCOM Bolt Carrier Group – Black Nitride

The Toolcraft 458 SOCOM Bolt Carrier Group – Black Nitride is a full-auto M16-profile BCG built to deliver reliable performance for AR-platform rifles chambered in 458 SOCOM. Featuring a 9310 steel bolt and 8620 steel carrier, this U.S.-made component is engineered for strength and precision in high-pressure applications. The carrier is treated with a black nitride finish for enhanced wear resistance, corrosion protection, and ease of cleaning.

This Toolcraft BCG includes a 4140 steel extractor and shot-peened bolt for added durability and consistent extraction performance. The bolt is also MPI-inspected to ensure structural integrity under stress. With three Mil-Spec gas rings and a Mil-Spec O-ring, this assembly delivers dependable gas system performance and reliable cycling.

The gas key is fabricated from 4130 steel and affixed with Grade 8 fasteners that are properly staked per military specifications. A cam pin made from 8620 steel and a 416 stainless steel firing pin round out this well-constructed assembly. This complete setup is ready for installation in AR-15s configured for the powerful 458 SOCOM cartridge.

Toolcraft serves as a trusted OEM for the U.S. military and top rifle manufacturers. Arm or Ally proudly offers only Toolcraft factory-coated BCGs, not third-party coated versions that void manufacturer warranties. Every BCG sold through Arm or Ally is covered by Toolcraft’s 100% lifetime no-questions-asked warranty, providing shooters with dependable support.

Whether you’re building a heavy-hitting AR-15 or upgrading a rifle for big-bore hunting or defense, the Toolcraft 458 SOCOM BCG – Black Nitride provides a strong, smooth-operating solution backed by proven military-grade manufacturing and lifetime reliability.