This is not new tech , like most , he has just copied & put his spin on it , its a co-ax type design , and Brugger & Thomet in Switzerland , used similar baffles on their pistol cans 20 yrs ago , also Ase Utra had at one stage a co-ax version of their Jet-Z , called Dual ? , used for the magnims like 338LM etc , basically added another outer tube , was very quite , but bigger & heavier , was not available for long , before they pulled it , maybe it did not sell well .
The old silenced Sterling MK5/ L34A1 , had a co-ax spiral disfuser .
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