The Minigun is a 7.62x51 mm, six-barreled machine gun. The rate of fire is between 2,000 to 6,000 rounds per minute which is crazy. It has Gatling-style rotating barrels with an electric motor as its power source. The "Mini" in the name is in comparison to designs that use a similar firing mechanism but larger shells, which is funny, because the Minigun isn't that mini in reality.
The Vulcan Minigun is a special heavy weapon and physically the largest weapon available in the game.
The Vulcan Minigun is a very strange weapon to use when first equipped, but when used correctly it can be an extremely powerful situational tool, capable of mowing down entire waves of enemies relentlessly. The most notable traits of the minigun are its incredibly large ammo pool of 750, far surpassing any other weapon, and its astonishing rate of fire, which is approximately 3000 rounds per minute. The weapon can be augmented further with Bullet Storm and Swan Song Aced, as the minigun can dish out devastating damage in the free-fire time the skills provide. Combined with its decent damage of 38, it can destroy police units in the blink of an eye. It also has a high threat rating, allowing it to keep enemies in place.
However, the weapon does come with severe drawbacks as well to compensate for its strengths. The Vulcan has absolutely abysmal accuracy, usually resulting is a hit accuracy of 10% or lower on most heists, although this is to be expected because it has the same mechanics of an LMG, and while it has a very large ammo pool, the reload is incredibly sluggish and can expose the player to enemy attacks. Ironically, while the weapon is extremely inefficient with ammo consumption, it makes very efficient use of ammo bags because ammo bags restore a percentage of total ammunition rather than a fixed number of rounds.
The Vulcan Minigun's reload time is not modified by tactical reloading, taking a flat 7.8 seconds regardless of whether the magazine is empty or still has ammunition remaining.
As with most LMGs, the Minigun's recoil brings the weapon muzzle up and to the right, so aiming low and to the left deliberately can help compensate for this. It is possible to "brace" the weapon by pulling one's aim downwards and to the left during a long burst to counteract the recoil.
Always bring one or more ammo bags as the Minigun cannot effectively replenish spent ammunition via pickups alone.
Bullet Storm is a great supplementary skill for ammo bag-focused players as it grants them a cumulative of 30 seconds of unlimited ammo for the two bags that can be deployed.
Swan Song is an alternative option for Fugitives.
It is possible to reach 23 detection risk with the Vulcan, allowing it to completely utilize the bonus provided by aced versions of Low Blow and Sneaky Bastard. However, weapon performance will be severely handicapped.
Though not recommended, the minigun can be used to kill snipers as a last resort. Burst-firing, zooming in, and the assistance of a laser sight can help.
*The LED Combo is based on the Leapers, Inc. UTG LED Weapon light and Laser. **Although the main flashlight has a toggle switch, the laser sight component of the LED Combo is pressure-activated, meaning the laser will stay on as long as the pressure switch is depressed. This switch is not placed where it should be, however (on foregrips, magazine wells, etc...) and is instead ziptied to the main taclight, leaving no plausible mean for the user to toggle it without awkwardly moving their off hand off the weapon and gripping the attachment itself.
The main concerns regarding this achievement are ammunition and speed. For the best results, one should treat this attempt as a regular Rats speedrun.
The Vulcan can prove useful when defending the cooking station on Day 1 of the heist should the team choose to make meth, though it is much faster and easier to just blow the lab and run. The inability to replenish ammo via pickups for both weapons means staying will quickly become a battle of attrition, with the crew on the losing side when the cooking becomes protracted and the (already limited) resources runs low.
Acquiring this achievement is simpler than it sounds if one is playing online with a full and capable crew. If the 3-man team can tackle the heist with little trouble, the player in question can safely bring a Vulcan and HRL-7, and then stay put next to the starting vehicle. Leaving the keyboard alone is the safest option, as one may open fire by mistake and ruin the attempt.
If soloing the heist, the best route to take is towards the roof (by the ladder, left of the entrance) or the portside of the building, as those spots are not too populated or open. Going into the courtyard with the highest detection rate is simply inadvisable. It is best to bring a high damage melee weapon as it is very difficult to perform stealth takedowns with such a high detection risk.
The achievement can be earned on normal difficulty, in which only three bags need to be secured. An ECM jammer can be placed and players can rush to grab and secure the money bags in the outside container field.
The Vulcan's staggering rate-of-fire actually makes the acquisition of this achievement somewhat difficult without some assistance. To make life easier, one should have Bullet Storm Aced, as the skill gives a juicy 15 seconds of leeway. It'd be easiest to do this at the Safe House as pulling it off in the middle of a firefight leaves one somewhat vulnerable. As soon as the player is ready, deploy an Ammo bag, then press down on the fire key and don't let go until the achievement pops.
The aced effects of Swan Song can help, so long as the trigger is held down for at least 16 seconds. Combining this with Bullet Storm can be the easiest method of attaining the achievement in combat, as you will only be expending ammunition for one second if attempted properly. To go even further, one could invest in the basic version of Fully Loaded, which would cease to make a dent in the weapon's starting ammunition pool.
It is based on the General Electric M134 Minigun retrofitted with the M134D's belt feed delinker on the lower left side of the weapon's motor block. Its name is a portmanteau of the M134 and the M61 Vulcan, also by GE, which is actually considered an autocannon due to the large 20x102mm shells it fires and not a machinegun, much less a "minigun".
The in-game Minigun uses the M61 Vulcan's fragmentation ammo drum as its "magazine", despite not featuring any of said ammo type's characteristics when fired.
The real-life Minigun feeds its belt links from the left hand side through the delinker, while the in-game weapon's counterpart of the mechanism is oddly placed on the other side.
The Vulcan has the highest rate of fire of any weapon in the game, at a staggering 3,000. The real M134's rate of fire can even go as high as 6,000 rounds per minute.
In practical scenarios, no powered rotary machinegun/cannon is supplied with sufficient ammunition for a full minute of firing, due to its weight, and it is generally ill-advised to keep the trigger depressed for more than even just a few seconds. The in-game drum capacity of 750 rounds would be emptied in less than 8 seconds of continuous fire were it to be fed into a real 6,000rpm Minigun.
It is also exceedingly impractical, if not hazardous to use a gatling gun as a man-portable weapon platform due to their sheer weight (a real-life Minigun weighs at least 48lbs, or approx. 22kg unloaded) and the extreme recoil generated from the firing can quickly shred the wielder's arms, backs and most of the upper torso's muscular system. That is assuming they even manage to lift the weapon off the ground in the first place.
The player prods an enemy with the Minigun when performing a Weapon Butt melee attack. This is ill advised in reality as the impact of the hit may damage the weapon barrel's shroud and interfere with precise firing. Also, the very heavy weight of the weapon would greatly hamper any attempt to perform a melee attack.
The in-game Minigun does not have a visible power source. This realistically prevents it from being operated as the barrel cluster would not spin and fire.
Also, the Vulcan's barrels spins clockwise when fired from the player's perspective, while a real minigun's barrel cluster goes counter-clockwise.
In contrast, the in-game Minigun is more realistic than most gatling guns or other renditions of the GE M134 in pop culture as it does not need to be spooled up prior to firing as gatling guns, especially M134s, fire when a loaded barrel reaches the topmost position without the need for momentum. This is explained by having the near-topmost barrel loaded with ammo from the start.
Letters "GLHF" can be seen on the back of the stock handles, an abbreviation for "Good Luck, Have Fun".
The gun has cables labelled Overkill and Last Bullet. The latter is a reference to Last Bullet (defunct, now known as Mod Workshop), the modding community of PAYDAY 2.
The label on the left side mentions two players, namely Tatsuto and Peasemaker. The first one was added as a birthday gift.
According to the label on the right side of the gun, it is made out of Hype Fuel and Tecci.
Prior to the CrimeFest 2015Day 1 Update, the Vulcan Minigun could not pick up dropped ammunition and would limit the user by 40% of their base speed, this has since been changed to no speed limitations and a 5 round average pickup-per-pack.