Just an FYI:
The weaver style rail, bought specifically @ Gander Mountain, does have four screw holes and 4 screws that comes with. The reciever of the Supernova is d/t specifically for these dimensions, BUT towards the end of the reciever, if side viewed, you will see that there's a little 'ridge' design right before the butt stock. With that little lump there I was only able to screw in 2 subsequent holes. All 4 screws would've been possible, but the rail would've been at an angle, resulting in a slightly tilted red dot. Still doable with a little windage/elevation adjustment, but bothers the hell outta me. In the end, looks fine and is sturdy, but have yet to test it. This weekend will be the actual breakin.