Mechanik’s Union

Mechanikal Prosthetics and their users tend to arise from the ranks of the adventurous, larcenous and militaristic; or in other words anyone gungho enough to afford one. But there remain countless occasions when hauling around a giant spike studded, gun festooned mechanical killing device is considered inappropriate. Disarming for these folk is quite literal, and having to leave ones limb behind at a guard station is both tedious and unhealthy. Most tend to make do with small compartments and the occasional built in pistol, but few truly powerful weapons can be hidden away without a massive rebuild of the arm itself.

Enter the Compartmentalized Cannon Arm, a special customized Ghordson breach-lock canon scaled down to fit inside the pistons and plating of a prosthetic arm. The barrel itself is built into the forearm, the upper arm being fitted with a 3 shot gravity magazine which allows for three consecutive shots with the cannon before the arm has to be opened up and reloaded manually. When closed up the weapon is near undetectable, blending with the other mechanika of the arm itself. With a Concentration Check (DC10) the wearer of the prosthetic arm may twist the wrist 120 degrees counter-clockwise which arms and releases the clockwork tension coils that open the arm itself as a move action.

The forefingers lock down and slide back forming the grip and trigger mechanism, the thumb of the hand flips up and back instead forming the charging lever. The forearm splits into four sections along its length and flowers open to reveal the brass cannon barrel itself. Shutting the arm is a standard action, as the casing has to be physically closed the and the wrist spring reset. Reloading after each shot requires the arm be straightened fully and held verticaly to the side before sliding back the chargeing lever. The clockwork shutter mechanism then propels the spent brass sabot casing from the side of the arm above the barrel. When released the charging lever springs back allowing gravity to slide the next shell into place from the magazine. When the forearm is cocked back 90 degrees to the upper arm, the magazine is locked off and the weapon is ready to fire. This process takes one standard action.

The cannon can either fire a solid iron ball or instead fire a grapeshot satchel  for ‘crowd control’. Whatever the selection it must be loaded with a Craft: Cannoneer check (DC 15) to load the shots into the magazine and clean out the barrel [Full Round Action]. Using this weapon without the -4 penalty requires a Exotic Weapon Proficiency: Cannon Arm. Due to the tremendous recoil, both hands are required for firing this weapon unless the prosthetic arm has a +5 strength enhancement or better and the user possesses the Exotic Weapon Proficiency.

Exotic Weapon – Scaled Down Ghordson:

• Damage: special*
• Range: special*
• Critical: special*
• Ammo: special*
• Reload: 1 standard action [Craft: cannoneer DC 10]
• Spell Failure: +20%
• Spot Check: DC 25 to notice hidden compartment
• Search Check: DC 18 to find release
• Cost: 3500 gp

*Solid Slug: 15-18gp | 3lb | 50ft | 2d8+4 |  x3 | special: bounce [on a successful hit another attack roll at -10 for 1d8 damage can be made against a target within 5ft directly behind the first target.]

Canister Shot: 10-13gp | 2lb | 15ft (cone) | 3d6 | x3 | special: [reflex save DC10 + attack bonus]

[more powerful coils can be added to this device, that draw one charge from the arms accumulator per activation but allows the wearer to activate the arm as a swift action.]