M40 HEDP Grenade for Aliens Pulse Rifle

If you build Andrew's excellent Aliens Pulse Rifle well you can't go get the queen xenomorph without some grenades to blow that egg sack off, can you? Now in the movie they are called “30mm grenades” but since the launcher in the actual hero guns was built from a Remington 870 shotgun it used a 12ga barrel which is 18.5mm (which is what this is). The model has 3 parts: the body, the red cap and the primer. The dual mode grenade can be hand thrown by pulling the cap and pressing the button activating the 3 second timer. As we see in the movie Gorman and Vasquez flip the cap and sacrifice themselves to free Hicks, Newt and Ripley in this manner. The primer for the shotgun shell is a separate part so you can make it appear as brass as it did in the movie.

I added step files if someone wishes to modify them in the CAD program of your choice. I have included the 30mm versions (match the verbal description in the movie rather than the actual props they used for filming.

My reference photos for this prop are:

https://avp.fandom.com/wiki/M40_HEDP_Grenade