Bravo Company USA AR-15 KeyMod Rail Covers Heat Test (HD)

Published on November 2, 2015
Duration: 4:29

This video demonstrates a practical heat test for Bravo Company USA (BCM) KeyMod rail covers on an AR-15 platform. Conducted by Mrgunsngear, the test involves firing 100 rounds through the rifle with covers installed over the gas block. Temperature readings before and after firing are compared to evaluate the effectiveness of the covers in mitigating heat transfer to the shooter's hand. The test highlights that while the covers significantly reduce handguard temperature, the barrel itself still reaches high temperatures.

Quick Summary

BCM KeyMod rail covers effectively mitigate heat on an AR-15 handguard during rapid fire, keeping surface temperatures between 130-178°F after 100 rounds. While the barrel can reach 299-428°F, the covers allow for comfortable handling of the handguard.

Chapters

  1. 00:20Introduction to Heat Test
  2. 00:53Initial Temperature Readings
  3. 01:16Test Firearm and Accessories
  4. 01:40Firing Sequence - First Magazine
  5. 02:01Firing Sequence - Second Magazine
  6. 02:20Firing Sequence - Third Magazine
  7. 02:37Post-Firing Temperature Analysis
  8. 03:37Conclusion and Recommendations

Frequently Asked Questions

How effective are BCM KeyMod rail covers at reducing heat on an AR-15?

During a test firing 100 rounds, BCM KeyMod rail covers kept the handguard surface temperatures between 130-178°F, making them holdable. This is a significant reduction compared to an uncovered handguard, though the barrel itself reached much higher temperatures.

What temperatures can an AR-15 barrel reach after rapid firing?

After firing approximately 100 rounds rapidly through an AR-15, the barrel temperature can reach between 299°F and 428°F, indicating substantial heat transfer from the firing process.

Can BCM KeyMod rail covers be cut to size?

Yes, the video mentions that BCM KeyMod rail covers are cuttable, allowing users to customize their length and fit on their AR-15's KeyMod handguard for optimal coverage.

What ammunition was used in the BCM KeyMod rail cover heat test?

The heat test utilized 55-grain Freedom Munitions rounds. These rounds are noted for being fast, which contributes to increased barrel heating during sustained firing sequences.

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