Aero Precision 6.5 Grendel/6mm ARC Bolt Carrier Group, Complete - Black Nitride

Aero Precision 6.5 Grendel/6mm ARC Bolt Carrier Group, Complete - Black Nitride

Complete your high-performance custom AR rifle build with the Aero Precision 6.5 Grendel / 6mm ARC Black Nitride Bolt Carrier Group. Purpose-built for duty-grade reliability and high-volume precision shooting, this full-auto profile M16 BCG provides exceptional endurance and effortless cycling. The carrier is precision-machined from heavy-duty 8620 steel and treated with a slick Black Nitride finish—an advanced low-friction coating that drastically reduces wear, decreases lubrication requirements, and makes carbon cleanup fast and easy.

At the heart of this assembly is a shot-peened, HPT-tested, and MPI-marked Type 2 (.136" depth) bolt engineered specifically for 6.5 Grendel and 6mm ARC cartridges. Machined from ultra-tough Carpenter 158 tool steel, the bolt features an upgraded extractor equipped with a black O-ring insert to ensure positive extraction under high pressure. Completed with forward assist serrations and a properly staked gas key, the Aero Precision Black Nitride BCG delivers absolute confidence and match-grade consistency in the field or on the range.

Features

Type 2 (.136") Bolt Face Geometry:
Engineered specifically for optimal extraction, cycling, and headspacing in 6.5 Grendel and 6mm ARC rifle platforms.

Carpenter 158 Tool Steel Bolt Assembly:
Precision-machined from Carpenter 158 steel, shot-peened for surface density, and rigorously HPT-tested and MPI-marked for ultimate structural integrity.

Slick Black Nitride Coating:
Features an advanced low-friction surface treatment that minimizes mechanical drag, simplifies maintenance, and provides superior corrosion resistance.

Heavy-Duty 8620 Steel M16 Carrier:
Machined from high-strength 8620 steel in a full-auto M16 cut to provide ideal lockup mass and smooth cycling velocity.

Properly Staked Gas Key & Upgraded Extractor:
Gas key is attached with hardened fasteners and staked to Mil-Spec standards, paired with a black O-ring extractor insert for reliable cycling under pressure.

Forward Assist Serrations:
Features deep forward assist engagement cuts for positive chambering verification in tactical environments.

Specifications