Weapons

Many weapons appear in the Simpsons.

Sawed-off shotgun
Moe Szyslak is variously seen aiming a sawed-off shotgun at regulars to his bar.

In 22 Short Films About Springfield, Herman points the barrels of a sawed-off shotgun at a gagged and bound Chief Wiggum and Snake Jailbird.

In Bart's Inner Child, Krusty the Clown aims a sawed-off shotgun at Homer to prevent him from bringing back the trampoline.

In $pringfield (Or, How I Learned to Stop Worrying and Love Legalized Gambling), Homer uses one to defend him and the kids from the "bogyman".

.45 Magnum
In Itchy & Scratchy: The Movie, Jasper aims the handgun at Abe who was attempting to steal his dentures.

Rifle
In Treehouse of Horror XIII segment "Send in the Clones" Homer used a rifle to shoot the three clones that admitted to knowing the way home