#long bow

Sans: Gaster Blaster

Our classic boy has his classic weapon, the Gaster Blaster that we see in the game. Long range to keep an enemy at a distance and hands free so Sans can concentrate on dodging. I didn't change anything up for this one, just straight copy and paste idea.

~Photo came from Teahub. I didn't see a link to the creator

Papyrus: Bone Staff

Also a pretty basic weapon. Papyrus doesn't need anything fancy to take someone down. He usually fights like we see in the game, by sending bones at his opponent from afar. But if hand to hand becomes necessary, out comes the staff!

Papyrus likes a little flair to his bone-work so he can shrink or grow his weapon to his liking, though the staff is usually about shoulder height on him. Occasionally he will wield two shorter bone clubs (about the length of your arm) instead of the single staff but the look is the same.

~Photo is a reference from the game.

Blue: War Hammer

Blue wields a two-handed war hammer. Having the face of a Sans, his weapon has the classic blaster skull, but he attacks like a Papyrus. Which is usually up close and personal fighting, though he retains the Sans trait of being incredibly difficult to hit.

Blue is small and very nimble, but his strength is nothing to sneeze at. You do NOT want to be on the receiving end of this hammer. Blunt-force trauma on the front, armor piercing spikes on the back, just like the French used to make.

~Photo by N.I.C.K on Aminoapps.com

Stretch: Scythe

This is photo is the exact inspiration for Stretch's weapon. Though in my mind's eye I see it as a little slimmer/smaller to mimic a real world scythe's proportions. The blade is still long and curving, the blaster's "breath" being that sharp blade. Traditionally scythes are not weapons, they are farm tools, but damn if they aren't efficient at cutting things down to size (Karmic retribution anyone?).

Stretch looks like a Papyrus so his weapon is hand-held, but his personality is of a Sans. This weapon has a long reach and can keep an enemy at bay. Stretch doesn't like to fight but he can swing his weapon around like it's nothing.

~Photo by buttercupsticksntricks here on tumblr.

Red: Chain Whip/Flail

Red is a Sans so he fights from afar. The end of his flail has a curved and sharpened bone instead of the barb shown in the picture. This weapon is mostly used for piercing armor, tripping up an enemy, or tangling them in the chains so they can be hauled in to be dispatched by a bone attack. Retreating opponents can also be caught and strung up for interrogation.

~Photo from u/griff-mac on Reddit

Edge: Rapier

Edge brings the fight to you with his rapier. I see the basket to be like a rib cage to protect his hand. In real world applications, a rapier is generally a side arm and is usually complimented with a buckler, dagger, or another sword. However, Edge uses this light weapon to make fast, precise attacks to cut and puncture enemies to dust in Underfell.

Any off-hand assistance is summoned bones to deflect an attack or to send bone patterns at a number of opponents that would be too many to take with this single weapon.

~Photo from the Sabersmith

Black: Twin Dirks

Dirks are generally longer than your typical dagger, but shorter than a sword. Black fights up close and personal with one of these bad boys in each hand. I would be remiss if the handle wasn't bone of course but the blade is just as sturdy and flat as the photo.

Black fights with two hands like Blue does with his two-handed hammer. But his weapon is a blade like Edge's.

~Photo from BladeMaster

Mutt: Long Bow

Mutt falls into the long range fighting category with his fellow Sans type personalities. But unlike Sans who shoots hands free with a blaster. Mutt fires manually like a Papyrus would. Being his underground's hunter, the bow was an obvious choice for him.

If you take that skull on the top half and mimic it on the bottom half so they are symmetrical, that is what I see his bow looking like.

~Photo from u/griff-mac on Reddit.