Apparently Griffin introduced a new type of BCG geared at increased suppression in AR platforms.

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https://www.griffinarmament.com/grif...eid=b47d68033e

The ports are located on the opposite side of a regular carrier and it has different geometry to prevent carbon buildup.

According to the literature on an 18" AR it reduces the right ear noise by over 10DB. Essentially it does dump gas to the inside side of the BCG and acts sort of like a temporary short term baffle that helps with gas dissipation.

I just saw this online so I'm reading more about it, but it does look interesting for sure. They are saying that the effects are highly dependent on gas length so we will look into that more.