This is a bomb cradle I designed for a soon to be released bomb rocket (a remix of an earlier design of mine).

It's loosely designed on the cradle used for the "Little Boy" atomic bomb, at least according to a photo I found on-line.

You can scale this cradle as needed for whatever bomb model you're using it for.

The things pictured are:

https://www.thingiverse.com/thing:3968966 (Special Delivery Mini rear eject bomb rocket - 1/2 size) https://www.thingiverse.com/thing:3920838 (Mini rear eject bomb rocket - 1/2 size) https://www.thingiverse.com/thing:3920822 (Rear Eject Bomb Rocket) https://www.thingiverse.com/thing:3157177 (100lb Aerial bomb) https://www.thingiverse.com/thing:3138410 (Original rear eject bomb rocket) https://www.thingiverse.com/thing:4327664 (Bullet Bill F-Bomb) SOON TO BE RELEASED (Little Boy Rear Eject A-Bomb Rocket)

While the design uses pins, you can replace those with screws or whatever you need. In the half sized cradle I just stuck a piece of 1.75 filament through and melted down the ends with a heated x-Acto knife to make rivets of a sort.