Ok !
I used for this design - part of the Hubble telescope , a huge Launcher rifle from Imaginary Land , and a couple of the Generals arms ...
How does it work ?
The mechanism pulls out a saber from the clip , to the front of the muzzle and holds it . The automated "robotic " arm ties a bomb on the hilt , and the other one lights the fuse with a zippo .
I promised the general that i would return his arms after the showcase