I have a 600mm x barrel for sale. It is confirmed to shoot less than 1/2 inch at 50 yards with jsb mk 2. In my opinion it is light years ahead of the normal smooth twist barrels from my past two impacts.
My price is 225$ shipped. Will come with a pellet probe too! Does not come with baffles.
My price is 225$ shipped. Will come with a pellet probe too! Does not come with baffles.