Here's a very, very, VERY KER-RAZY idea for a BW Superweapon. Take note: I made this weapon with the thought of it being released much, much later (like BW version 3.0 perhaps...), so just read it and n'joy!
DESCRIPTION:
A "SUPERWEAPON" in every sense of the word - the HVC667-MPDT (Man-Portable, Deployable Turret), also known as "the Puntgun". Developed, created and manufactured by H-Tech Industries, it was kept hidden from the Government for years until the Skrith had begun its invasion. Very little is known about this weapon, save of the fact that only the strongest (Gene-Boosted) Terrans are capable of utilizing this weapon to the fullest without having to be deployed beforehand - its mere recoil can kill any normal human being. However, for military-standard grunts, H-Tech incorporated its tactical deployment system to help them mow down the hordes of Krao who tried to overwhelm their bases.
The Puntgun has a 4-Gauge, revolving Quad-Barrel design, capable of firing a few types of ammunition either by letting them loose in one, tremendous blast through all 4 chambers (also known as "Full-Blast" mode) or by activating the Puntgun's "revolving cannon"-mode (also known as "Roulette" mode), turning it into a quasi-rapid-fire gun.
Ammo Capacity:
Players are able to carry 16 of each type of ammo, 8 of which can be immediately loaded into the Puntgun. However, players have to physically remove any remaining ammo inside the Puntgun if they want to load a different type of ammo, thus making reloading a hassle. A well-versed soldier may be able to fully reload a Puntgun in less than 6 seconds.
Ammo Types:
This weapon is able to equip 3 types of ammo:
1. "Hornet's Nest" SFR (Searing Flechette Rounds) - Specially-processed Talozium crystals, made by H-Tech R&D specifically for the Puntgun. Having a wide spread and decent, medium range, these rounds are broken down into smaller fragments of sharp Talozium that can easily pierce armor and penetrate and sear flesh. Best used for pinning down and/or taking out large amounts of opponents.
DAMAGE: 5-10 per shard (depending on body-part hit), 8-10 shards per round.
2. Brenneke Shells - Special-issue ammunition requested by the military to be incorporated into the Puntgun's arsenal. These shells are highly-accurate, but cause tremendous recoil (especially on "Full-Blast"). Best used to immobilize heavily-armored vehicles.
DAMAGE: 200 per shell to players on-foot and 75 to vehicles (upon direct-impact).
3. "Firestorm" VVMS (Variable-Velocity Mortar Shells) - Once used by the para-military as a flare... Legend has it that an advance company, who were being outnumbered by the Krao, tried to send a distress signal by firing a once-called VVF (Variable-Velocity Flare). However, due to their haste, they had accidentaly set the flare on low-velocity as well as a narrow angle. But as luck would have it, this would, in turn, drive the Krao horde away in a blaze of fire. Nowadays, these Mortar Shells have been incorporated into the Puntgun's arsenal and are capable of reigning down a fiery chaos upon enemies, as well as creating "Firewalls" that may block the advancement of enemy troops.
DAMAGE: 100 per shell (upon direct impact to players on-foot), 10 scorch-damage.
DEPLOYMENT/SPECIAL FIRE:
As it is said earlier, the Puntgun cannot be used by normal Terrans without being deployed first. H-Tech has developed the Puntgun's tactical deployment system to hasten the process (as opposed to assembling the mount manually) as well as improving its accuracy for non-Gene-Boosted army personel. Once fully-deployed, the Puntgun's only draw back is its obvious lack of mobility. To remedy this, it is highly-recommended to deploy the weapon on a stable-ground vehicle which supports such deployment (like a TECHNICAL) rather than a hovercraft (MANTA).
Primary Fire:
Utilizes the Puntgun's "Full-Blast" mode. It fires the ammo in all four of its chambers into an incredible single blast, generating immense chaos and recoil. Afterwards, it takes a few precious seconds for the weapon to rearm itself with the remaining ammo inside its clip.
Secondary Fire:
Activates the Puntgun's "Roulette" mode. It fires the ammo at the top-most barrel, after which it revolves gattling gun-style. However, unlike a regular gattling gun, the Puntgun's barrels revolve quite slowly - only 1 shot can be produced per .6 seconds; but because of this, it has the advantage of never overheating, making it the perfect choice for suppressing enemy fire for a good 6-7 seconds. It has far lesser chaos and recoil than "Full-Blast" mode.
(Take Note: When undeployed, both Primary and Secondary Fire become melee attacks capable of knocking down enemies with the blunt end of the Puntgun.)
EDITS:
-Nerfed down Brenneke Shells' damage from 500 to 200 (to players) and 75 (to vehicles).
of course, that is easily changed.. 
