In order to manually change the crosshair for a desired weapon, you should know its' script file name. Some of them are a bit confusing, so here is a table containing all the filenames you may need.
The original idea and way of implementing weapon specific crosshairs can be found here.
| Weapon name(s) | Class | Script file name |
|---|---|---|
| Scattergun, Force-A-Nature, Back Scatter | Scout | tf_weapon_scattergun.txt |
| Soda Popper | Scout | tf_weapon_soda_popper.txt |
| Shortstop | Scout | tf_weapon_handgun_scout_primary.txt |
| Baby Face's Blaster | Scout | tf_weapon_pep_brawler_blaster.txt |
| Pistol and reskins | Scout | tf_weapon_pistol_scout.txt |
| Winger, Pretty Boy's Pocket Pistol | Scout | tf_weapon_handgun_scout_secondary.txt |
| Flying Guillotine | Scout | tf_weapon_cleaver.txt |
| Bonk! Atomic Punch, Crit-a-Cola | Scout | tf_weapon_lunchbox_drink.txt |
| Mad Milk, Jarate, Gas Passer | Scout | tf_weapon_jar_milk.txt |
| Bat and all reskins, Candy Cane, Boston Basher, Sun-on-a-Stick, Fan O'War, Atomizer | Scout | tf_weapon_bat.txt |
| Holy Mackerel | Scout | tf_weapon_bat_fish.txt |
| Sandman | Scout | tf_weapon_bat_wood.txt |
| Wrap Assassin | Scout | tf_weapon_bat_giftwarp.txt |
| Rocket Launcher, Black Box, Original, Liberty Launcher, Beggar's Bazooka | Soldier | tf_weapon_rocketlauncher.txt |
| Direct Hit | Soldier | tf_weapon_rocketlauncher_directhit.txt |
| Cow Mangler 5000 | Soldier | tf_weapon_particle_cannon.txt |
| Air Strike | Soldier | tf_weapon_rocketlauncher_airstrike.txt |
| Shotgun, Reserve Shooter, Panic Attack | Soldier | tf_weapon_shotgun_soldier.txt |
| Buff Banner, Battalion's Backup, Concheror | Soldier | tf_weapon_buff_item.txt |
| Righteous Bison | Soldier | tf_weapon_raygun.txt |
| Shovel and all reskins, Equalizer, Pain Train, Disciplinary Action, Market Gardener, Escape Plan | Soldier | tf_weapon_shovel.txt |
| Half-Zatoichi | Soldier | tf_weapon_katana.txt |
| Flame Thrower and all reskins, Backburner, Degreaser, Phlogistinator | Pyro | tf_weapon_flamethrower.txt |
| Dragon's Fury | Pyro | tf_weapon_rocketlauncher_fireball.txt |
| Shotgun, Reserve Shooter, Panic Attack | Pyro | tf_weapon_shotgun_pyro.txt |
| Flare Gun, Detonator, Scorch Shot | Pyro | tf_weapon_flaregun.txt |
| Manmelter | Pyro | tf_weapon_flaregun_revenge.txt |
| Thermal Thruster | Pyro | tf_weapon_ |
| Gas Passer, Jarate, Mad Milk | Pyro | tf_weapon_jar.txt |
| Fire Axe, Lollichop, Axtinguisher and reskin, Homewrecker and reskin, Powerjack, Back Scratcher, Sharpened Volcano Fragment, Third Degree, Neo | Pyro | tf_weapon_fireaxe.txt |
| Hot Hand | Pyro | tf_weapon_ |
| Grenade Launcher, Loch-n-Load, Iron Bomber | Demoman | tf_weapon_grenadelauncher.txt |
| Loose Cannon | Demoman | tf_weapon_cannon.txt |
| Stickybomb Launcher, Scottish Resistance, Sticky Jumper, Quickiebomb Launcher | Demoman | tf_weapon_pipebomblauncher.txt |
| Bottle and all reskins | Demoman | tf_weapon_bottle.txt |
| Eyelander, Scotsman's Skullcutter, Claidheamh Mòr, Persian Persuader, Pain Train | Demoman | tf_weapon_sword.txt |
| Ullapool Caber | Demoman | tf_weapon_stickbomb.txt |
| Half-Zatoichi | Demoman | tf_weapon_katana.txt |
| Minigun, Natascha, Brass Beast, Tomislav, Huo-Long Heater | Heavy | tf_weapon_minigun.txt |
| Shotgun, Family Business, Panic Attack | Heavy | tf_weapon_shotgun_hwg.txt |
| Sandvich, Dalokohs Bar and reskin, Buffalo Steak Sandvich, Second Banana | Heavy | tf_weapon_lunchbox.txt |
| Fists and all reskins, Killing Gloves of Boxing, Gloves of Running Urgently, Warrior's Spirit, Fists of Steel, Eviction Notice, Holiday Punch | Heavy | tf_weapon_fists.txt |
| Shotgun, Widowmaker, Panic Attack | Engineer | tf_weapon_shotgun_primary.txt |
| Pomson 6000 | Engineer | tf_weapon_drg_pompson.txt |
| Rescue Ranger | Engineer | tf_weapon_shotgun_building_rescue.txt |
| Frontier Justice | Engineer | tf_weapon_sentry_revenge.txt |
| Pistol | Engineer | tf_weapon_pistol.txt |
| Wrangler and reskin | Engineer | tf_weapon_laser_pointer.txt |
| Short Circuit | Engineer | tf_weapon_mechanical_arm.txt |
| Wrench, Southern Hospitality, Jag, Eureka Effect | Engineer | tf_weapon_wrench.txt |
| Gunslinger | Engineer | tf_weapon_robot_arm.txt |
| Build PDA | Engineer | tf_weapon_pda_engineer_build.txt |
| Destroy PDA | Engineer | tf_weapon_pda_engineer_destroy.txt |
| Placing a building | Engineer | tf_weapon_builder.txt |
| Syringe Gun, Blutsauger, Overdose | Medic | tf_weapon_syringegun_medic.txt |
| Crusader's Crossbow | Medic | tf_weapon_crossbow.txt |
| Medi Gun, Kritzkrieg, Quick-Fix, Vaccinator | Medic | tf_weapon_medigun.txt |
| Bonesaw and all reskins, Ubersaw, Vita-Saw, Amputator, Solemn Vow | Medic | tf_weapon_bonesaw.txt |
| Sniper Rifle, Sydney Sleeper, Bazaar Bargain, Machina | Sniper | tf_weapon_sniperrifle.txt |
| Huntsman and reskin | Sniper | tf_weapon_compound_bow.txt |
| Hitman's Heatmaker | Sniper | tf_weapon_sniperrifle_decap.txt |
| Classic | Sniper | tf_weapon_sniperrifle_classic.txt |
| Submachine Gun (SMG) | Sniper | tf_weapon_smg.txt |
| Cleaner's Carbine | Sniper | tf_weapon_charged_smg.txt |
| Jarate, Mad Milk and Gas Passer | Sniper | tf_weapon_jar.txt |
| Kukri and all reskins, Tribalman's Shiv, Bushwacka, Shahanshah | Sniper | tf_weapon_club.txt |
| Revolver, Ambassador, L'Etranger, Enforcer, Diamondback | Spy | tf_weapon_revolver.txt |
| Knife and all reskins, Your Eternal Reward and reskin, Conniver's Kunai, Big Earner, Spy-cicle | Spy | tf_weapon_knife.txt |
| Sapper | Spy | tf_weapon_sapper.txt |
| Disguise kit | Spy | tf_weapon_pda_spy.txt |