Toolcraft AR10 / 308 Bolt Carrier Group - Nickel Boron

Toolcraft AR10 / 308 Bolt Carrier Group – Nickel Boron

The Toolcraft AR10 / 308 Bolt Carrier Group – Nickel Boron is a durable and high-performing component designed for DPMS-pattern AR-10 rifles chambered in .308 Winchester and related calibers within the 308 parent cartridge family. Manufactured in the U.S.A. and backed by a 100% no-questions-asked lifetime warranty, this BCG is ideal for builders seeking a reliable, easy-to-clean upgrade for their AR-10 platform.

This bolt carrier group features a 9310 steel bolt and an 8620 steel carrier, both coated in Nickel Boron to enhance corrosion resistance, surface hardness, and lubricity. The carrier includes forward assist serrations and a 4130 steel gas key, which is secured with Grade 8 fasteners and properly staked for long-term durability. The bolt is MPI-inspected to ensure structural integrity under high-pressure firing conditions.

The bolt assembly includes a D2 steel extractor equipped with a Mil-Spec O-ring, triple gas rings, and a 4140 steel cam pin. A 8740 stainless steel firing pin completes the assembly, contributing to consistent ignition and dependable performance. All components are factory-coated and assembled by Toolcraft, ensuring full warranty coverage and uniform quality.

This standard model is fully compatible with most .308 Winchester family cartridges. However, for rifles chambered in higher-pressure rounds like 6.5 Creedmoor, Arm or Ally offers a dedicated Toolcraft 6.5 Creedmoor Nickel Boron Bolt Carrier Group, designed specifically for that application. Shooters seeking additional extraction reliability may also consider the Toolcraft 308 Double Ejector BCG, which features a reduced diameter 0.065″ firing pin and dual ejectors for enhanced ejection performance in large-frame ARs.

Toolcraft is a respected OEM supplier for the U.S. military and several commercial manufacturers. Every Toolcraft BCG sold by Arm or Ally is sourced directly from the manufacturer, never re-coated by third parties, preserving Toolcraft’s full warranty. With proven materials, high-precision machining, and premium finishes, this AR-10 Nickel Boron BCG is an excellent choice for shooters who demand reliability and ease of maintenance.