Hi guys I hope someone who has this same rifle can help its an hatsan striker edge. 22 and the person who had the rifle before me has filed the barrel down, too get the original sights off the barrel is now damaged with flats on the the barrel from filing. So i want too get someone with the same rifle some measurements. If so I'm looking too find out the end of the barrel in dimensions from the end tip then up 5 inches has the barrel tapers.. So best way to measure is with a plain paper strip run round the barrel and measure, do that 3 times back up the barrel 5 inches. The 3 measurements will tell me the dimensions in 3 spots I then should end up with the taper dimensions. I then could make 3 metal rings in the 3 diameters of your barrel . So I then can file it down to the rings and get the perfect diameter of the barrel. All be in well with your help.https://ibb.co/Yb2m4n3