The Alien RPG CRB is originally set in 2180.
Chariots of the Gods is 2183 and the CMOM is in 2184.
The Xeno-Zip is post those dates according to the lore I'm reading. Hence, does not exist yet.
Very nice ideas here... I gather your new players will have a blast !!! Awesome !Thanks, AM. As you said, the rifle range is a great place to teach new players the range rules.