I handled a brand new one at a gun store a couple of months ago. They had about 8 on the rack. The first one I picked up was difficult to move the top lever over and open the gun. The sales person stated that occasionally this does happen with the F-16 and quickly handed me another one. I found the action to be extremely tight. I needed To apply considerable force on the barrels to open the gun. Perhaps this would improve with break in. One positive I noticed about the design is that the action seems narrower and shorter than many of the boxlock designs on the market.
