I ´m doing some proofs with a weichrauch barrel (22"). Few days ago I mechanised the barrel for walther actions. Here ´s the result. Of course I cheked the concentricity and alignment. Sorry for the unfocused photos but my phone can ´t do it better. The power gain is aroun 8-10 m/s!! I don ´t have general pictures of the gun but I ´ll post later. I want to install an air stripper because the movement of the gun when you shoot is very unconfortable. Is the length of the barrel properly for 16J (12ft/lbs)??? Or very long?? Cheers!!!