Crescent Crossbow

 is a gun that fires medium-size stars that split into 3 smaller bouncing stars upon contact. When fully charged, the gun will fire a large star for 3 ammo which splits into 10 medium-size stars, which in turn split into 3 smaller stars, filling the room with projectiles.

Trivia

 * This gun could be a reference to Terraria, where fallen stars can be used as ammunition with similar sound and visual effects.
 * The description "Moon Shots" could be a reference to GTA Vice City and the Borderlands game series.
 * The reference to moonlight could mean a connection to Sailor Moon, who fights evil by moonlight with her crescent wand.
 * The Apollo missions to the moon were called "Moon Shots" by NASA and the media.
 * The synergy may be a reference to Alas, Babylon,  a book by Pat Frank.