Guntec AR-15 Nitride Bolt Carrier Group Mil-Spec BCG - GT-BCG

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