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Are these 5.56/300 Blackout? Side or down vent? — 3 Answers

by jr., from DE, United States Asked on February 17, 2025

Name KAK Industry K-SPEC Enhanced Low Mass AR-15 5.56mm/.300 AAC Blackout Bolt Carrier Group (4)
As Low As $80.99 Save Up to 10%
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Answered by Jordan, member, from TX, United States, on July 07, 2025

I’m inclined to believe the BCGs are 5.56/300BLK given the price comparison to KAK’s website and when I purchased my PVD-coated BCG it was 5.56/300BLK.

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Answered by Jordan, member, from TX, United States, on July 07, 2025

They don’t describe the product very well. The only way to tell the difference is to look for the side vents. If there are side vents it isn’t down-venting. If the side vents are missing, it’s down-venting. As far as calibre, I’m unable to discern what product is which calibre.

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Answered by Mike, guest, from TX, United States, on April 12, 2025

The one I purchased was 556 and it vents into the Magwell. Probably the best bcg I’ve ever run. And it’s quieter when running supressed with very little gas back to the face. 1000 rounds through it so far and zero issues

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Last updated 2025-11-12 UTC.