FAXON SUPERFINISHED 5.56 M16 BOLT CARRIER GROUP - NITRIDE
Faxon
Faxon Superfinished 5.56 M16 Bolt Carrier Group – Nitride
Category: Rifle Parts
Platform: AR15
Series: Bolt Carrier Groups
Caliber/Cartridge: 5.56 NATO
SKU: FF556BCGCNITRIDE | UPC: 816341020870
MSRP: $145.00
The Faxon Superfinished 5.56 M16 Bolt Carrier Group (Nitride) is a high-performance, full-auto compatible BCG engineered to deliver smooth cycling, reliable extraction, and long service life in AR-15 and M16-pattern rifles. Starting with “MIL-SPEC” as the baseline, Faxon refines the details that matter—material selection, inspection, surface treatment, and finishing—to provide a bolt carrier group built for demanding shooters.
This BCG features a 9310 tool steel bolt, salt bath nitride treatment on the bolt and carrier for increased surface hardness and corrosion resistance, and Faxon’s Superfinish on the carrier body to help reduce friction and fouling for easier maintenance.
Why Choose Faxon Superfinished BCGs?
Faxon Bolt Carrier Groups are designed for consistent function in hard-use rifles—from high round-count training to competition and defensive builds. The bolt is MPI tested to verify material soundness, the gas key is secured with grade 8 fasteners and fully staked, and the assembly is built to maintain reliable action with modern triggers and full-auto fire control groups.
Key Features
- 9310 Tool Steel Bolt
- Salt Bath Nitrided Bolt & Carrier for hardness and corrosion resistance
- Superfinished Carrier Body to reduce friction and fouling
- Magnetic Particle Inspection (MPI) for quality assurance
- Full MIL-SPEC Heat Treatment and shot peened to MIL-SPEC
- Back of lugs chamfered for reliable cycling
- S7 Extractor
- Spring, insert, & “Crane” O-ring installed
- Full-auto compatible (M16 pattern) with forward assist serrations
- Gas key with grade 8 fasteners and full staking
Detailed Specifications
- 9310 Tool Steel Bolt
- Full MIL-SPEC Heat Treatment
- Shot Peened to MIL-SPEC
- Magnetic Particle Inspection (MPI)
- Back of Lugs Chamfered for Reliability
- Spring, Insert, & “Crane” O-Ring Installed
- Salt Bath Nitrided Bolt & Carrier
- S7 Extractor
- Superfinished Carrier Body
- Full Auto Compatible
- Forward Assist Serrations
Frequently Asked Questions
Is this bolt carrier group full-auto compatible?
Yes. This is an M16-pattern bolt carrier group that is full-auto compatible and includes forward assist serrations.
What is “Superfinish” and why does it matter?
Faxon’s Superfinish is a refined surface finish on the carrier body designed to help reduce friction and fouling, resulting in smoother operation and easier cleaning over time.
What material is the bolt made from?
The bolt is made from 9310 tool steel and is heat-treated, shot-peened, and MPI-tested for durability and reliability.
What does MPI tested mean?
Magnetic Particle Inspection (MPI) is a non-destructive inspection process used to help verify that the bolt material is sound and free from defects.
Is this BCG compatible with AR-15 rifles?
Yes. This BCG is designed for AR-15 / M16-pattern rifles chambered in 5.56 NATO and is commonly used in .223/5.56 builds.
Does the gas key come properly staked?
Yes. The gas key uses grade 8 fasteners and is fully staked for long-term service.