Slow motion full auto and visible bullet flight.

[Doz]

Didn't look an especially PLB to me, quite an effective brake by the looks of things.

[BamBam]

BamBam..

Any idea of the calibre of the featured rifle ? I have to say the muzzle break does appear to very effective at controlling 'muzzle flip'

Jenks

It looks like a 7.62x39 case, so either that or 6.5 Grendel as its an AR platform..

Alan

Alan..

Given the lack of movement at the muzzle I was wondering if it was a PLB (piddly little bullet) calibre.. 5.56mm. I didn't think it was because the ejected cases looked too big.

Jenks

The short barreled AR in the vid is in .300BLK, 7.62x35mm. The AR-10 is in 7.62x51mm and the AK 7.62x39mm.
You can buy the brake on Lantac's website.