How to get uncommon natural weapons?

Question

I'm interested in ways how to get more natural attacks on a player character.

Not interested in Claws and Bite since those are common and relatively easy to acquire.

Wings are also relatively easy with the Powerful Wings feat.

For gore attack I found Spirit Oni Master, but there might be other ways.

Mainly interested in the uncommon ones such as hooves, talons, tentacles, pincers, tail slap, slam and sting to add them to my full attack (Lashing Tail is useless for instance).

EDIT: Out campaign is limited to Paizo materials.

Answer 1

There are several grafts available among the Demonic Implants, Necrografts, and Fleshcrafting options.

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Bite

• Poison Fang (Fleshcrafting)
• Animal Mask item
• Cloak of Fangs item
• Mouthpiece of the Dominion item
• Ophidian Coil item
• Ring of Rat Fangs
• Razortusk feat (Orcs)
• Sharptooth feat (Ratfolk)
• Unusual Heritage feat (Dhampir)
• Tusked trait (Orc, Half-Orc)
• Mother's Teeth trait (Goblin)
• and several other race feats or (alternate) racial traits (usually for Orcs, Half-Orcs, Goblins/Goblinoids, Tieflings, Aasimar, Catfolk, Skinwalkers, Ratfolk, Tengu, Kitsune)

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Claw

• Burrowing Claws (Fleshcrafting)
• Retractable Spines (Fleshcrafting)
• Aspect of the Beast feat

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Gore

• Crown of Horns (Demonic Implant)
• Deadly Horns feat
• Animal Mask item
• Healm of the Mammoth Lord item
• Greathelm of the Mammoth Lord item

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Hoof

• Brazen Hooves (Demonic Implant)

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Slam

• Necrograft Arm (Necrograft)
• Chaos Reigns feat
• Fiendish Obedience (Sentinel) for Kostchtchie

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Sting

• Stinging Tail (Fleshcrafting)
• Fleshwarped Scorpion's Tail item
• Wyvern Cloak item

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Tail

• Cloak of the Manta Ray item
• Tail Strike spell
• Gelugon Armor item

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Talon

• Demon Talon (Demonic Implant) (RAW a claw attack)
• Talons of Leng item (RAW a claw attack)

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Tentacle

• Grasping Tendril (Fleshcrafting)
• Tentacle Cloak item

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Wing

• Dread Wing armor quality
• Powerful Wings feat (requires natural wings)
• Metallic Wings feat (Aasimar)
• Mighty Boughs feat (Gathlain)

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Others/Several

• Mutated Shape feat (Wildshape)
• Beaststrike Club item
• dozens of Polymorph spells like Monstrous Extremities, Ooze Form or Undead Anatomy, as well as other magic abilities
• a ton of class features and archetypes, from Alchemist Discoveries (Feral, Tentacle) and Barbarian Rage Powers (Totem of the Fiend) Oracle Curses & Revelations – too many to list
• of those class features, the Sorcerer's bloodline powers (e.g. Draconic Claws, Salamander's Tail, or Serpentine's Fang) can be accessed class-neutral via the Improved Eldritch Heritage feat.

I couldn't find any Pincers.