The Guntec USA GUNTEC AR9 BOLT CARRIER GROUP combines reliable 8620 steel with a mil-spec AR-9 design to deliver a rugged, ready-for-duty bolt carrier system that fits Glock and Colt style lower receivers for streamlined compatibility. This BCG features an external extractor, a dust cover compatible profile, and full heat treatment to maximize durability under demanding conditions, while the QPQ salt bath nitride finish provides enhanced corrosion resistance and low-friction operation for repeated, dependable cycling. Made in the USA, this steel AR-9 bolt carrier group is crafted to meet high standards of performance, precision, and longevity, offering a compact footprint with dimensions aligned to modern AR-9 configurations. Whether you're building a compact 9mm rifle or upgrading an existing AR-9 platform, this bolt carrier group delivers consistent lockup, smooth extraction, and reliable impedance-free cycling across a range of ammunition types. Trust this Guntec USA solution to keep your rifle running smoothly on the range or in the field, with a focus on compatibility, durability, and long-term value.