Nerf Picatinny Scope

My son wanted something a little different than what he was seeing in the aftermarket arena and we're adding picatinny rails to his blasters. The paint job will probably be OD green and black.

The idea was to keep the crosshair its own model, so we could easily design new ones. The reality is that everything fits so tight that, once it's in, it's not coming out. Same goes for the rear part of the tube.

EDIT: Made the recesses on the side of the scope shallower, so it isn't paper-thin towards the back. Also added some chamfers to the clamping sections.