According to members of our family a Canooter Valve doesn't exist kind of like a box of grid squares Until NOW. - The goal was to produce a full auto rated suppressor that was hearing safe and make it the most compact unit available anywhere. AND keep the price of the suppressor and tax stamp under 500.00 so that normal folks can afford it. - .223/5.56 caliber 1/2-28 threading (others pending) - 136dB at the shooters ear - 8.4 oz. 3.9 inches long (3.2 added length to barrel) - 1 1/8 inch in diameter - No blow back through the charging handle - Made from 416 Stainless - Full Auto Rated 7 barrels and longer - FLASH HIDER machined into the end of the Canooter Valve - Custom Serial Numbers are available upon request (no extra charge).