REQUEST: constant gun

[HI IM DAISY]

could I have help with a gun something or other that the player is constantly holding and can be used with one of the buttons on my keyboard? also if you could make the projectiles curve downwards slowly and disappear when they hit the floor or a wall that would be a good bonus

[MarioLover64]

Billy gun
Lunalua the bullets down to the ground

[HI IM DAISY]

but I need the character to not be able to put it down after they pick it up