CMMG M16 Bolt Carrier Group 55BA419 5.56mm Black Phosphate
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Specifications
Material Steel (9310 bolt, 8620 carrier with chrome lining, 4140 extractor); phosphate finish
Weight 0.6 pounds
Description
Product Overview
The CMMG 55BA419 M16 bolt carrier group for 5.56mm AR-pattern rifles is built to Mil-Spec standards with a 9310 steel bolt, an 8620 steel chrome-lined carrier, and a 4140 steel extractor. Finished in phosphate for improved wear resistance and corrosion control, it is designed for reliable operation in 5.56mm builds that use an M16-style BCG.
Key Features
- Mil-Spec style M16 bolt carrier group for 5.56mm AR-platform builds
- 9310 steel bolt for strength and durability
- 8620 steel chrome-lined carrier to support smooth cycling and longevity
- 4140 steel extractor for dependable extraction performance
- Phosphate finish for corrosion resistance and long-term wear protection
Upgrade or replace your AR bolt carrier group with a Mil-Spec configuration from CMMG for consistent performance in 5.56mm setups.
WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to WWW.P65WARNINGS.CA.GOV
5.0 | 2 Reviews
- SKU:
- 55BA419
- UPC:
- 852005002431
- BUDS ID:
- 89861
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Customer Reviews
5.0 out of 5
2 total reviews
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Latest Reviews
Joseph L.
6 months ago
Verified Purchaser
I dropped this into a...
I dropped this into a Wyndham Arms AR and it was a perfect fit. No issues at all, didn't even need to be broken in.
David M.
8 years ago
Verified Purchaser
Quality MILSPEC, but...
Quality MILSPEC, but had to ask to get detailed specks.
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| Material | Steel (9310 bolt, 8620 carrier with chrome lining, 4140 extractor); phosphate finish | Mil-Spec 8620 tool steel bolt carrier with Carpenter No. 158 bolt | Stainless steel bolt carrier group with black phosphate exterior; heat treated chrome-lined inner | 8620 steel carrier with chrome-plated and phosphate-coated components | Steel with Nickel Boron coating |
| Weight (lbs) | 0.6 | 0.71 | N/A | 0.0 | 0.72 |
| Actions | Current Item |
