Umbrella Corporation AR-15 Bolt Carrier Group [BCG] Review (HD)

Published on February 17, 2015
Duration: 6:21

This review covers the Umbrella Corporation AR-15 Bolt Carrier Group (BCG), highlighting its generally milspec construction with a focus on published specifications. The BCG features a bolt made from Carpenter 158 steel, heat-treated, shot peened, HPT, and MPI tested individually. The carrier is constructed from 8620 steel with chrome lining, and the gas key is machined from 4130 Chrome Moly steel with robust staking. The reviewer notes zero malfunctions in various firearms and praises the company's transparency in publishing detailed specs.

Quick Summary

The Umbrella Corporation AR-15 Bolt Carrier Group is a milspec component featuring a bolt made from Carpenter 158 steel, individually HPT and MPI tested. The 8620 steel carrier is chrome-lined, and the gas key is 4130 Chrome Moly steel with robust staking. The company's unique selling point is its full transparency in publishing all detailed specifications.

Chapters

  1. 00:31Introduction to Umbrella Corp BCG
  2. 02:30Bolt Details: Material & Testing
  3. 02:56Extractor and Spring System
  4. 03:22Carrier and Gas Key Construction
  5. 03:42Branding and Finish
  6. 03:54Company Transparency & Specs
  7. 04:13Comparison to Other Brands
  8. 04:48Price and Availability
  9. 05:12Final Thoughts & Q&A

Frequently Asked Questions

What material is the Umbrella Corporation AR-15 bolt made from?

The bolt in the Umbrella Corporation AR-15 Bolt Carrier Group is made from Carpenter 158 steel. It is also heat-treated, shot peened, High Pressure Tested (HPT), and Magnetic Particle Inspected (MPI) individually.

What are the key features of the Umbrella Corporation AR-15 BCG carrier?

The carrier is constructed from 8620 steel and features chrome lining in both the bolt raceway and the gas key. The gas key itself is machined from 4130 Chrome Moly steel and is well-staked.

Does the Umbrella Corporation BCG use a standard extractor spring?

No, the extractor on the Umbrella Corporation BCG is made from 4340 tool steel and utilizes a five-coil spring. This design eliminates the need for the Crane O-ring commonly found in other bolt carrier groups.

What makes the Umbrella Corporation BCG unique compared to other milspec options?

Umbrella Corporation distinguishes itself by publishing every single specification for their BCG, down to the nitty-gritty details. This transparency, combined with high-quality materials and testing, sets it apart.

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