Algodoo

y tho

The hammer keeps the slide jammed when it is in the back position. The piece that collides with the hammer has to be longer.

The whole gun has to have 0 friction, select everything and change friction to 0

The bolt should collide with the blue part of the rounds' shells, NOT the cyan part. Also you can use the cyan part as the one that gets killed, since you will not have to stack the empty shells (you don't need them to collide with each other).

The magazine's springs have to have much less constant but much more length