Guntec USA M16 Bolt Carrier Group for .223/5.56 and 300BLK Nitride Coated
Looking for a top-notch, complete bolt carrier group for your AR-15? Look no further than Guntec USA! Additionally, their Guntec AR-15/M16 Bolt Carrier Group’s are nitride coated inside and out for enhanced durability and longevity and are assembled by experienced professionals.
The bolt carrier is made from 8620 steel, while the bolts crafted from high-quality 9310 steel. Also, the gas keys been properly staked, and the extractor spring features an upgraded O-ring for increased tension. All surfaces are also nitride coated. And of course, the bolt has undergone magnetic particle inspection to ensure proper strength and machining.
In other words, this BCG is designed to provide optimal function and performance. So, if you want the best of the best for your AR-15, choose Guntec USA!
Guntec AR-15/M16 Bolt Carrier Group Features:
- Mil-Spec Carrier
- 8620 Tool Steel
- Full Auto M-16
- Mil-Spec Bolt
- 9310 Steel
- Magnetic Particle Inspected (MPI)
- Also, Mil-Spec Extractor
- 8620 Tool Steel
- Also, Nitride Finish
- Extractor Spring
- Mil-Spec Gas Key
- 8620 Tool Steel
- Grade 8 Hardware
- Properly Staked
- Weight: 11.6oz
- Made in the USA
- SKU: GT-BCG
Nitride (salt bath ferritic nitrocarburizing) is a surface treatment applied to the entire bolt carrier group — carrier body, bolt, cam pin, and gas key — that hardens the metal surface and produces a corrosion-resistant, low-friction finish. Unlike a coating applied on top of the metal, nitride penetrates the surface itself, meaning the finish cannot flake, chip, or peel during normal use. The matte black finish closely resembles phosphate in appearance but provides superior corrosion resistance and a harder surface than standard mil-spec phosphate. Carbon fouling sheds more readily from a nitrided surface than from phosphate, reducing cleaning time compared to a standard mil-spec BCG. The Guntec USA AR-15/M16 BCG is built to mil-spec dimensions and is compatible with standard AR-15 and M16 pattern upper receivers in 5.56 NATO and .223 Remington. For AR-15 owners who want a durable, low-maintenance BCG with a proven surface treatment at an accessible price point, the Guntec USA nitride BCG is a reliable choice for defensive, range, and general-purpose AR-15 builds. Pair it with an AR-15 Charging Handle to complete your bolt carrier assembly, and browse our full AR-15 Bolt Carrier Groups selection for other options.
