Jama-Jama! is a mission that takes place in Las Brujas Cottage in Arizona. Your goal is to shoot a specific number of creatures called Jama-Jama when they pop their heads out of crates and barrels.
Fast firing and quick loading guns are best for this mission, since time is limited. Also guns like the Flak Cannon and the Crucificator work quite well due to being able to take multiple targets out due to the splash damage. The Double-Barrel Shotgun is a good weapon too, because lead shot spreads and hit the target even if not perfectly aimed.
You've been challenged to a shootin' contest! It's Jama-Jama time, honey! Shoot the jama-jamas!
You shot every last one of them weird little critters.
Very easy to very difficult.
Hit the requested number of targets.
Double-Barrel Shotgun and handguns. A shotgun can spread a nice pattern and take even 2 Jama-Jama together! Be preppared, however to lose some due to reload time of the shotgun.