Air aventuri synthetic in 22 or 25 cal with hand pump no scope $560 everyday
Damn fine gun
Search it on youtube
These are nice guns. I've got the Avenger in 22 and 25 now. Easy 1" at 50 yards.
I don't know about the metal roof though. Even with the regulator dialed down, I think you might punch through the metal roof.
If you can spend a little more, the wood stock version is a nice upgrade. I've got a wood stocked 22, plastc 25. Both shoot very well. The plastic just feels a little flexy. The wood stock does add a little weight.
