Fingers weaponized for firepower are usually a specific variation of the Arm Cannon which involves placing a ranged weapon in every finger and occasionally the thumb as well. Smaller machines may have all fingers linked to a common magazine or ammo management system while larger units can have a separate system in the same finger as its gun. There are also cases where the fingers are merely barrels.

This layout is more often used in 'raw power' machines to indicate their destructive ability. The implication is that the unit has many times the firepower of a grunt's main weapon- by having eight or ten of that weapon in its hands alone.

The primary claimed benefit of this design is that it offers More Dakka without sacrificing finger articulation. This ignores the fact that flexible or folding barrels would severely reduce the durability of the guns. Proposed workarounds include housing the entire weapon system in the fingertips, reducing the power of the weapons, making all the fingers rigid rather than articulated or having articulated fingers that go rigid before firing- all of which sacrifice either hand or weapon functionality. In the end, Rule Of Cool is the only proper justification.

Pay special attention to the fingers of a Humongous Mecha if they appear to be flexible hollow tubes or if they sport openings or lenses at the ends because these indicate guns. 'Mittens' with rows of barrels are sometimes used by designers who want to mix things up, though these are even less practical as they lose all but the most basic hand functions. Some less humanoid designs may have hand-mounted guns that double as fingers rather than fingers with guns inside, usually in cases where the machine has less than five fingers on each hand.

Concealed finger guns can be made virtually indistinguishable from unarmed fingers, particularly if the user's unarmed fingers also look mechanical. Any gun parts that appear on security scans can be handwaved as part of the hand's mechanisms (which they are). Mechanical or mechanically augmented characters who have not previously been shown with weapons can be revealed to sport these without stretching Willing Suspension of Disbelief.

Apart from the design difficulties listed in the firepower section, concealed finger guns also need an even greater degree of miniaturization or integration with the rest of the hand to keep them from being detected, placing further limits on their functionality. Cruder designs that impede the function of the fingers to allow greater power also make detection easier. Finally, risk of detection by internal scans complicates the inclusion of any built-in magazine as most ammunition has a distinctive appearance, limiting the guns to a small number of shots per weapon if solid rounds are needed.

Due to all these limitations, concealed finger guns are usually used for assassination or self defense. However, Humongous Mecha may make effective use of this design by concealing anti-personnel weapons in their fingers- these may not be effective on other large machines but are enough for infantry and light vehicles or aircraft.

• 004 from Cyborg 009 has finger machine guns as part of his arsenal.
• Giant Robo has missile launchers in its fingers.
• GunBuster fires its Buster Missiles from its fingertips.
  • Several machines from the sequel Diebuster have finger guns as well.
• The Moskas in Katekyo Hitman Reborn! fire out of their fingers and Mini Moska fires popcorn out of his fingers.
• Mazinger Z: In episode 10 Mazinger-Z showed he could shoot missiles from its fingers. That weapon was never used again, though (surely because the animators realized how silly and dangerous was storing missiles into a Rocket Punch).
  • Several Mechanical Beasts were armed with this weapon (for example, Danchel in one of the earlier episodes. Or one Beast from the Mazinger-Z vs Devilman feature).
• Since the Zeong from Mobile Suit Gundam, Gundam series have occasionally put beam guns in the fingers of enemies they want to make especially threatening. The earlier Gouf from the same series had machine gun fingers.
• One of Blackbeard's henchmen in One Piece has these.
• Robot Romance Trilogy:
  • Combattler V's Rock Fighter.
  • Voltes V's Finger Missiles.
• Among many other armaments, the cyborg Grey the Ninelives had these in the anime of Trigun.

• A somewhat obscure Marvel Comics villain named Professor Power fought many heroes using Power Armor. One version of the armor included guns located in each fingertip of his gauntlets which he used in a fight against Spider-Man and the original members of the X-Men.

• Voyage Into Space, being based on the earlier Giant Robo manga, featured a giant robot whose main armament was missiles he could shoot from his fingertips.

• Mighty Morphin' Power Rangers had the Dragonzord launch missiles from its fingertips.
  • The Delta Command Megazord of Power Rangers SPD did the same with lasers.
  • In Power Rangers Jungle Fury, the Rhino Ranger's arm-mounted weapon had laser barrels on one side, looking similar to fingers when that side was used.
• The 1974 incarnation of Mechagodzilla could fire missiles from his fingertips.
• In The Aquabats Super Show, Jimmy the Robot has lasers built into his fingers.

• Shadowrun. Guns in cybernetic fingers were first mentioned in the 2nd Edition Cybertechnology supplement.
• In Warhammer 40000 Obliterators are infected with a "virus" that turns their whole body into Shapeshifter Weapon. They sometimes manifest this trope (especially older models).
  • Older versions of 40K had the Jokaero relics known as digital weapons: miniaturized versions of lasguns, flamers and needleguns that could fitted onto fingers like rings. They also popped up as equipment cards in the Spin-Off boardgame Space Crusade.

• In Xenogears, Maria's Seibzehn has missile launchers in its fingers.
• The WA-FINGER weapon and its variants in the Armored Core series are multi-barreled machine guns designed to look like hands, probably just to justify the name.
• Earthworm Jim gets to use a multidirectional gun that fires out of the three fingers on his suit's hand. It burns through ammo very quickly, but damn if Jim doesn't look like he's having a blast while firing it.
• Aigis from Persona 3 has machine gun fingers fed by an external drum magazine.
• In Super Mario RPG, one of Geno's weapons is the Finger Shot, which fires bullets out of each of his fingers.
  • In the same game, one of Smithy's true form's attacks involve using these.
• The SRX from the Super Robot Wars series, due to its fingers being formed from the shoulder cannons of one of its components.
• Sigma has these in the manga. After he fired it, he used the heat residue to scar his eyes.
  • Violen from X2 also sports these.
  • Serpent also has this.
  • In Megaman X remake Maverick Hunter X Vile has 3 sets of weapons, his fingers are one of them (for the Vulcan slot)
• MACE, the Humongous Mecha Final Boss of Intrusion 2 has these. It can fire both fireballs and homing missiles from them.

• The assassin Mr. Igoe in Innerspace has a mechanical hand, which in one scene actually fires a bullet from the tip of its index finger - thereby forever one-upping the small child who had pointed his own finger gun at him. (Kid was fine. His balloon wasn't.)

• Foaly armed Commander Root with the concealed variety in Artemis Fowl because he couldn't go into a hostage negotiation obviously armed.
• Honor Harrington has a gun built into her finger and, from the description, her hand does move into something approximating the traditional finger gun position when she fires it. Of course, her entire arm is an Artificial Limb, and given that assassins keep trying to kill her throughout the books, this seemed like a prudent idea. Her prosthetic eye is specially equipped with targeting software to allow her to shoot from the hip as well - although her keen kinesthetic sense may make such aid superfluous. As you may have guessed from the list of prosthetic limbs Honor has, more than a few people have attempted to kill her over the years.
• E.E. Smith's Family D'Alembert series has family patrician Etienne and his weapon hand. Ostensibly lost in a circus accident (the cover story), it was replaced with something infinitely more useful. The various digits can be retrofitted with mission-specific tools (on one occasion he unscrews his pinkie for use as a grenade), but the index finger is a permanent fixture that contains a small blaster.

• From Get Smart: "Would you believe this finger is a real gun?"
  • They do find it hard to believe, so Max fires the gun in the air to prove otherwise. Unfortunately it's single shot. Max later reveals that it has a second shot ... and promptly fires it into the air.
  • On one show Max is kidnapped and subjected to a Manchurian Agent treatment - they have to let him 'escape' to avoid suspicion, but he repeatedly misses opportunities handed to him. At one point an agent approaches him, he raises a finger and the agent 'surrenders', wise to the old 'finger gun' trick. Max insistently points out it's only a finger until the agent walks out in frustration. Max keeps plotting an escape, muttering "Come on, Smart, use that fantastic brain of yours!"

• Inspector Gadget actually has a laser gun in one of his fingers but with all the other stuff he has in them it's no surprise that he can't seem to get it out when it would be useful rather than hilarious.
• The Powerpuff Girls DYNAMO has finger missiles.

• There are novelty guns molded to look like fingers, which if held properly look as if the wielder is pointing with his or her own index finger. Technology does exist to integrate firearms into the fingers of prosthetic hands but the possibility does not seem to have been explored as the hands themselves are still being perfected.