Upgrade your AR-15 build with the Guntec AR-15 Nitride Bolt Carrier Group, a Mil-Spec BCG engineered for dependable function and long-term durability in demanding environments. This precision-crafted component combines high-quality materials with advanced surface treatment to deliver smooth cycling, reduced maintenance, and consistent performance across a range of shooting applications. Key Features 8620 steel bolt carrier paired with a 9310 steel bolt for exceptional strength and wear resistance under repeated use. Salt bath nitride finish on both carrier and bolt provides superior corrosion protection, easier cleaning, and reduced friction for reliable operation. M16 profile carrier ensures full compatibility with standard AR-15 upper receivers and gas systems. Magnetic particle inspected (MPI) bolt verifies structural integrity, minimizing the risk of defects that could affect reliability. Hydraulically staked carrier key with Grade 8 screws maintains secure attachment during high-volume firing. USA-made construction backed by a 1-year warranty for added confidence in your investment. Benefits for AR-15 Owners The nitride treatment solves common pain points like rust formation in humid conditions and carbon buildup that slows cleaning. Shooters experience smoother bolt travel, faster follow-up shots, and extended service life without frequent lubrication. Whether you're building a home-defense rifle, competition setup, or general-purpose carbine, this BCG supports reliable feeding, extraction, and chambering in .223 Remington, 5.56 NATO, and .300 BLK configurations. Specifications Platform: AR-15 Cartridge Compatibility: .223/5.56 NATO/.300 BLK Bolt Material: 9310 Steel Carrier Material: 8620 Steel Finish: Salt Bath Nitride Carrier Profile: M16 Weight: 11.5 oz Dimensions: 6.5" L x 1" W x 1.2" H High Pressure Tested: Untested Magnetic Particle Inspected: Yes