I have what I believe to be a Air Ripper muzzle break and adapter M18x1,5 thread I received this from a friend and have no need for it now as seen in the pictures it's a press on fit and inside diameter of 0.667, I'm not sure but I was think it fits a Texan 308 barrel, the adapter and muzzle break at Lethal Air are $105 new I'm asking $50 shipped OBO or trade for JSB 25cal 25.39 pellets. 
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