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M16 5.56 Bolt Carrier Group - M16 Bolt Carrier Group Black
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$211.26
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SKU: 100020758
Overview
Built as a complete, fully assembled bolt carrier group for AR15, M16, and M4 platforms, this auto-version unit is intended for shooters who want a Mil-Spec-oriented replacement or build component. It features a parkerized exterior, a chrome-lined inside carrier, and a gas key secured with Grade 8 fasteners and proper staking to support dependable gas system function. The bolt assembly is machined from Mil-Spec Carpenter No. 158A steel and shot peened, with a tool steel machined extractor included. For hunters and serious rifle users, it is a straightforward option when the priority is a correctly specified, ready-to-install BCG rather than added features or embellishment.
Why Hunters Choose the Bravo Company
Fully Assembled
Bolt carrier group for AR15,
Machined Usgi
Specifications for Mil-Spec compatibility
Parkerized Exterior
Chrome-lined carrier interior
Includes Proper
Grade 8 fasteners and staking
Bolt Assembly
Is shot peened and includes
Key Features
- Fully assembled BCMA MPI complete bolt carrier group
- Auto version for AR15, M16, or M4 platforms
- Parkerized exterior with chrome-lined inside carrier
- Machined to USGI specifications
- Includes proper Mil-Spec gas key
- Gas key secured with Grade 8 fasteners and Mil-Spec staking
- Bolt assembly is shot peened and includes a tool steel machined extractor
Best Used For
- AR-15, M16, or M4 owners needing a fully assembled auto-pattern bolt carrier group
- Users seeking a USGI-spec carrier with a proper Mil-Spec gas key and staking
- Builders prioritizing a complete bolt carrier group for a compatible rifle setup
- Hunters and shooters who want a parkerized exterior with chrome-lined carrier interior
- Those looking for a bolt carrier group assembled to Mil-Spec-oriented specifications
Specifications
| Assembled | fully assembled |
|---|---|
| Bcg Type | complete bolt carrier group |
| Bolt Steel | Carpenter No. 158A(R) steel |
| Bolt Treatment | shot peened |
| Carrier Interior | chrome lined |
| Compatibility | AR15, M16, or M4 |
| Exterior Finish | Parkerized |
| Extractor | tool steel machined extractor |
| Gas Key | proper Mil-Spec gas key |
| Gas Key Fasteners | USGI domestic mfg Grade 8 fasteners |
| Gas Key Finish | chrome lined |
| Gas Key Staking | properly staked per Mil-Specs |
| Gas Key Treatment | heat treated per GI specifications |
| Manufacturing Standard | USGI specifications |
| Mpi | yes |
| Version | auto version |
Pros
- Fully assembled bolt carrier group for AR15, M16, or M4 platforms.
- Machined to USGI specifications for Mil-Spec compatibility.
- Parkerized exterior with chrome-lined carrier interior.
- Includes proper Mil-Spec gas key secured with Grade 8 fasteners and staking.
- Bolt assembly is shot peened and includes a tool steel machined extractor.
Considerations & Trade-offs
- Auto-pattern bolt carrier group; confirm compatibility with your specific AR15/M16/M4 setup before purchase.
- Parkerized exterior and chrome-lined carrier interior are specified, but the listing does not provide details on other finish or wear characteristics.
- The bolt assembly is described as Mil-Spec Carpenter No. 158 steel and shot peened; no additional performance claims are provided beyond the listing.
- This is a fully assembled complete BCG, so it is a replacement/upgrade part rather than a component-level build kit.
Suggested Comparisons
- AR-15/M16/M4 bolt carrier groups
- Complete bolt assemblies
- Mil-spec gas key components
- AR-pattern rifle parts
Suggested Accessories
- Bolt carrier group
- AR-15 cleaning kit
- Gas key staking tool
- Spare bolt assembly
Frequently Asked Questions
Is this bolt carrier group fully assembled out of the box?
Yes. The product description states that the BCMA(R) (MPI) complete bolt carrier group is fully assembled.
What firearms is this BCG intended for?
It is described as an auto version bolt carrier group for AR15, M16, or M4 platforms.
What finish and internal carrier treatment are listed?
The carrier is described as parkerized on the exterior and chrome lined on the inside.
What bolt and extractor details are provided?
The bolt assembly is described as machined from Mil-Spec Carpenter No. 158A(R) steel, shot peened, and it includes a tool steel machined extractor.
Does the description mention the gas key and staking details?
Yes. It says the carrier includes the proper Mil-Spec gas key, with the gas key chrome lined and heat treated per GI specifications, secured with USGI domestic mfg Grade 8 fasteners and properly staked per Mil-Specs.