Checked the box over again, no extension. The rifle was on the shelf at the dealer and they put it back in the box, I suppose they lost it.
Range report in about 2 hrs after the sun comes up. I am anxious to try yet another Blue Dot load, because it seems like they always shoot pretty good. Right now I envision going kind of the opposite direction of most of the handi shooters. Instead of lots of barrels I'm thinking with a cartridge as versatile as the 243, with handloading I can do everything I would want with the one barrel.
It's the "handiness" of this little gun that made me take it home, it was love at first touch when I picked it up. The last handi I had was a more standard size and weight 223, and I never got very enthused about it.