Guntec USA AR9 Bolt Carrier Group 9mm Luger Mil-Spec Nitride

The Guntec USA AR9 Bolt Carrier Group is a dedicated 9mm Luger BCG engineered for AR-9 pistol-caliber carbines and rifles. The carrier is machined from fully heat-treated MIL-SPEC 8620 steel and finished in a low-friction black nitride coating, delivering excellent wear resistance, corrosion protection, and easier cleanup compared to traditional phosphate finishes. This BCG is full-auto rated and built to standard MIL-SPEC dimensions for drop-in fitment.

Designed for versatility on the receiver side, the AR9 BCG is compatible with both Glock-style and Colt-style AR-9 lower receivers, and the carrier is fully dust-cover compatible for a clean, factory-style fit. The bolt assembly includes a robust extractor optimized for reliable cycling across a wide range of 9mm loads.

At roughly 14.9 ounces, this is a solid drop-in option for new 9mm AR builds or as a replacement upgrade for worn factory BCGs. Made by Guntec USA.