Editing M90 shotgun

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{{Ratings}}
{{Weapon
|image=[[Image:M90A CAWS.jpg|300px]]
|name=M90 Close Assault Weapon System
|manufacturer= [[Weapon System Technologies]]
|model=[[DTM Series]]-'''M90 CAWS'''
|type=Close Assault Weapons System
|cost=cR. 2200
|size=Handheld, Two-Handed
*M90: 
**Length: 118.3 centimeters 
*M90A:
**Length (o/a):123.9 cm (48.8 in.)
**Length (barrel):61 cm (24 in.)
**Weight (empty):5.4 kg (11.9 lbs)
**Weight (loaded): 5.8 kg (12.8 lbs)
| damage per hit=*Instant kill (Close range)
*Low-medium (medium ranges)
*None (long range)
| magazine= 8 gauge magnum (3.5”)
*Earlier models: 12 Shells
*M90A: 6 Shells
| maxammo=
| fire=Pump Action
| ammotype=[[Soellkraft 8 Gauge Shell]]
| operation=Manual Pump-Action
| rate of fire= 1.5 shell/second
| velocity=300-400 m/s (980-1300 f/s)
| accuracy=Low to Medium
| range=Short to Short-Medium Range
*40 meters (131 ft)
| era=
| counterpart=
| counterweapon= 
| affiliation=[[United Nations Space Command]]
}}
{{Quote|I believe that the sound of racking the pump of a shotgun is universally recognized as ‘kiss your ass goodbye’.| Unknown Marine}}
The '''M90 Close Assault Weapon System'''<ref>http://www.bungie.net/projects/halo3/content.aspx?link=h3shotgun</ref><ref>[[The Art of Halo]]</ref> (abbreviated '''M90 CAWS'''), more commonly known as the '''M90 Shotgun''', or informally as the Shotty, is the [[United Nations Space Command]]'s primary shotgun and is one of the most lethal infantry weapons used by front line forces.

==Introduction==
The '''M90 Shotgun''' is the main UNSC close combat [[weapon]], packing extreme firepower at close range. It can kill almost any enemy in one hit if every single pellet makes contact, and can usually kill up to three [[Covenant]] [[Grunts]] with only one blast at a similar distance. It is often wielded in urban conditions, where the tight spaces are conducive to the shotgun's wide spray.  The shotgun also makes a perfect defensive weapon to fend off Covenant boarding parties inside warships, and is particularly effective against the [[Flood]] due to the tendency of Flood forms to close in and melee their targets. 

==Design Details==
Not much has changed in the shotgun's design since its conception. The weapon's power lies in the great stopping power of its quad-ought, or 0000, ammunition load, which, while extremely powerful in close-quarters combat, is not useful at medium-range and cannot be used for long-range. If the M90 is the only weapon that you possess, then you may need to run at enemies to take them down. This poses the threat of being injured as you run, thus depleting your [[shields]] energy. However, it should be noted that the shotgun wielder can occasionally engage enemies at medium ranges, if circumstances allow.

===Ammunition===
[[Image:The_round.jpg|thumb|left|200px|The shell is being discarded from the shotgun. Note the hippo and the 8 GAUGE MAG written on its side.]]
The M90 Shotgun uses the [[Soellkraft 8 Gauge Shell|Soellkraft 8 Gauge magnum shotgun Shell]]. This is an incredibly large round, not used by any modern military, but recoil has been said to be relatively low,<ref>http://www.bungie.net/projects/halo3/content.aspx?link=h3shotgun</ref> so either technology must have improved in the future, or the one wielding it (Master Chief, the Arbiter, Brutes, etc.) is strong enough to handle it compared to most others. The shells have a hippo on the side in ''Halo: Combat Evolved''. The shotgun in ''Halo 3'' has only 6 shells per magazine, a downsize from ''Halo 2'''s 12.

===Influence===
The ''mechanical'' design of the M90 shotgun is loosely based on the South African Neostead shotgun which features dual six-round top-loaded magazines. The weapon features two integral tube magazines with a total capacity of twelve rounds (6+6+1) and ambidextrous bottom ejecting shells. It is chambered for standard 12-Gauge 2.75-inch cartridges. The ''aesthetic'' design is a composite of multiple pump-action designs, most notably, the Mossberg 500.

===Advantages===
[[Image:1211479389 Shotty Discharge.jpg|thumb|A close-up of the M90 discharging a shell.]]
Since the Shotgun fires 15 spreading pellets per close-range shot, the combined relative force of each relatively weak pellet does a significant amount of damage. Its high damage potential (as much as a rocket in ''Halo: Combat Evolved'' at close range) makes it effective against almost any Covenant unit (even the [[Hunter]], if shot in its exposed back), but only if the player can get close enough to achieve a substantial placement of shot.

In addition, this weapon is extremely effective against all forms of Flood at short and medium ranges (depending on the model), and is capable of eliminating Combat Forms in one shot, and a group of [[Infection Forms]] with one shot also. The shotgun also reloads in a different manner than the rest of the weapons in ''Halo''. Each round is put into the shotgun, one-by-one, so reloading all six/twelve shells at one time may take a while. However, the player may interrupt the reloading process at any time and fire with however many rounds are currently loaded into the weapon. Another popular way of firing the shotgun involves inserting a shell, firing, and then inserting another shell, etc. While this takes slightly longer, it has the advantage of always having shells chambered. Apart from that it is devastating in close combat, stronger than an Energy Sword swipe, but slightly weaker than the Energy Sword lunge, although this is the weapon to use against the Energy Sword in close combat. The only counter weapons at close range are the Energy Sword, and the [[Sniper Rifle]]. Probably one of the most effective ways to fight is to fire one shell at very close range and immediately after that, melee. You can do this by basically pressing both the right trigger and the B button at the same time with only a slight pause between pressing the buttons. The shell will usually take out your opponent's shield leaving him with basically no health and the melee will most likely kill him. It also has a small lunge ability like the sword. In addition, it is very effective to wait around corners with this weapon to kill anyone that comes around. This is an easy way to get a killing spree and shotgun spree.

===Disadvantages===
While highly effective at close range, at longer ranges it is rendered useless. The shotgun's pattern is extremely loose, and fans out quickly, thus at farther ranges when you fire the shotgun, only one or two pellets out of the 15 might hit.  Also, the time needed to reload can make fighting at long range even more difficult due to the fact that it reloads slow, especially without cover to hide behind. The average reload time for a Shotgun is about 9 seconds, which is 9 seconds that makes you very vulnerable and a perfect target for the enemy. As compensation for this fault, a medium or long range weapon like the [[Battle Rifle]] or the ''Halo: Combat Evolved'' [[M6D Personal Defense Weapon System|M6D Pistol]] will make up for the Shotgun's medium to long range damage problem, and reloading can be fixed by being able to fire a shot at any time while the gun is reloading.

==Models==
===M90 Mk I===
[[Image:M90 Shotgun.jpg|150px|thumb|left|The M90 Mk I, the model used in [[Halo:CE]]]]
The first model presented in the [[Halo]] series, introduced in ''Halo: Combat Evolved''. It contained 12 shells at a time (the biggest shotgun ammo capacity in the Halo trilogy), and the player could carry up to 60 more shells (a total of 72 shells). It had the longest (and most realistic of the series) effective range of all the three models, and its fifteen tungsten pellets could kill, weaken or injure targets at short to medium ranges. Although it is more likely to kill a closer ranged enemy as the shotgun is weak on further distanced enemies, the shotgun could also kill nearly any infantry target at point blank range. It even had the capabilities to take on lightly armored [[vehicles]] such as the [[Ghost]] effectively. In the original Halo, players could hold the trigger button down for continuous (not rapid) fire (strangely, on the PC version, doing this will cause the rest of the rounds to fire silently). To melee, the player swings the Shotgun up and brings the butt of the weapon on someone's head/front. While this looks deadly, it is a medium-slow melee. If the player fires the entire magazine or if the player picks up a Shotgun without a full magazine and fires it empty, the character model will rack the shotguns pump after reloading, although most players usually opted to reload after every shot. This version of the M90 shotgun had a quicker reload than the Mk.II model. 

The M90 Mk.I shotgun was arguably the best anti-Flood weapon in ''Halo: Combat Evolved''. Using it, players could engage multiple Flood targets at point blank, close, and even medium range, although each individual shot's effectiveness varied greatly. However, this model shotgun was a guaranteed kill at close range, and players came to rely heavily on this weapon in the later stages of the first Halo game.

===M90 Mk II===
[[Image:M90 Mk II Shotgun.jpg|150px|thumb|left|The M90 Mk II, this is the model used in Halo 2]]
The second model, the '''M90 Mk II''', was used in ''[[Halo 2]]''. It changed significantly from the Mk I. Its appearance slightly changed, most notably with the green [[Iron Sights]] instead of blue. The melee is much faster than the Mk I's, swinging the Shotgun horizontally instead. Its performance changed as well. It could not kill targets at more than a few feet away, though a quick shot-[[melee]] combo would usually kill an enemy very quickly. It does absolutely no damage at longer ranges. The shotgun was only very effective at very close range, and the player only carried 36 spare shells (a total of 48 shells), unlike the 72 shells like the Shotgun in ''Halo: Combat Evolved''. Unlike the previous version, it had almost no stopping power when used against vehicles, and like before, with the range decrease, its effectiveness against the Flood was reduced slightly. It probably took this change as [[Bungie]] introduced the [[Energy Sword]] as a usable weapon, and wanted to "even the odds". It never cocked after reloading. It was also extremely effective against berserking [[Brutes]].
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===M90A===
[[Image:H3 Shotgun.jpg|left|150px|thumb|The latest model, the M90A, which is used in Halo 3]]
The newest model, the '''M90A''', is used in ''Halo 3''. There are a variety of graphical and gameplay changes from the previous models, and it is arguably the most powerful variant of the trio. The blue iron-sights have been reintroduced, it has a longer barrel and a [[flashlight]] is mounted on the side. Unlike the older models which had a 12 shell magazine, it only has a 6 shell magazine. The player can carry 30 spare shells or 5 loads (a total of 36 shells or 6 loads), as opposed to the first version's 72, or ''Halo 2'''s 48. To make up for this, its effective range is far greater than the M90 Mk II, as it can kill targets at two or even three times the range, depending on their health. It even has enough firepower to send a [[Warthog]] out of control if the vehicle is shot in the right place, although the Warthog is much less durable in ''Halo 3''. This variant of the Shotgun also appears bulkier and stronger than its ''Halo Combat Evolved'' and ''Halo 2'' relatives. The action is always cycled after reloading, despite the fact that this would eject a shell if any were already loaded.
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===Similarities/Differences Between The M90 Models===
[[Image:sm_h3_Shotgun.gif|thumb|A render of the M90A]]
*The Shotgun appeared in ''Halo: Combat Evolved'' in the levels ''[[343 Guilty Spark (Level)|343 Guilty Spark]]'', ''[[The Library]]'', ''[[Two Betrayals]]'', ''[[Keyes (level)|Keyes]]'' and ''[[The Maw]]''. The weapon's model was the Mk I, and had very pronounced blue front and back sights. It may have fired a different kind of ammunition than its ''Halo 2'' counterpart, as the range of this model was much longer, and the damage was slightly higher. The M90 Mk I was pump action (as every other shotgun model), but the player could hold the fire button for continuous fire and pump (This cannot be done in ''Halo 2'' and ''Halo 3''). The player could carry a very large amount of shotgun shells at one time, a total of 72 shells (with a rare overload of slightly over 100).
*It also appeared in ''Halo 2''. This model was the Mk II, and although it did more or less the same amount of damage, its range was greatly reduced. It also featured a green iron sight and a decreased ammo capacity, with the player only able to carry a total of 48 shells at a time. It should also be noted that the reload time was significantly slower.
*The newest model, the M90A appears in ''Halo 3'', as it did in the [[Halo 3 Beta|Beta]]. The original blue iron sights have returned, and it now has a longer range, but half the magazine capacity of the ''Halo: Combat Evolved'' model. The player can carry up to a total of 36 shells.
*The DTM Series is available in 20 gauge and 10 gauge for the civilian market. The 8 gauge is only sold to law enforcement (such as the WST DTM/LE model) and military agencies.
*The M90 series of Shotguns have another feature as well: all have a detachable stock, allowing the shotgun to be used at even closer quarters. If you look carefully at the M90 (any game), you can see that the stock is held onto the actual firearm by a "pin and button" system.
*Only the M90A pumps the slide after reloading any number of shells. The Mk. I is only pumped reloading a full 12 shells, which is realistic. The Mk. II doesn't pump at all.
*The M90 of ''[[Halo: Combat Evolved]]'' had the fastest reload of the Shotguns in the Halo Series

==Tactics==
===General Tips===
*A point-blank shot, followed up by a melee attack generally ensures a kill if your opponent survives the original blast.
*To make sure you get an easy kill, crouch down and hide around corners and wait for an enemy to come, this technique is usually referred to as ''[[camping]]'' by most gamers.
*You can easily kill Brutes by firing close up then meleeing or vice-versa.
*The Melee attack from the Shotgun usually ensures that an active Flood Combat Form will be destroyed, rendering it incapable of being resuscitated by an Infection Form.
*The shotgun has a slight delay after every round you fire.
*The Shotgun is the best close ranged weapon in terms of visibility. It is hard to see whether it is a shotgun or not, whereas the [[Gravity Hammer]] and the [[Energy Sword]] are easily seen.
*Be sure you always reload after any engagement. The shotgun takes quite a bit of time to reload fully.
*Can be used most effectively with a Carbine, Sniper Rifle, Beam Rifle, or Battle Rifle as a secondary.

===Campaign Recommendations===
One of the most dominating weapons in the Halo Trilogy, the Shotgun shows its most effective side in ''The Library'' in ''Halo: Combat Evolved'' and in ''[[Sacred Icon (Level)|Sacred Icon]]'' in ''Halo 2''. 
Despite its very slow reload rate, this is arguably the best weapon against the Flood. Players might want to duck behind somewhere just in case you need to reload .
This weapon is easily the best choice in the game for taking out powerful enemies such as groups of [[Flood Combat Forms]], [[Elites]], and Brutes. Even on ''Halo: Combat Evolved'' [[Heroic]] difficulty, it is possible to take out Elites with as few as two shells, and only on [[Legendary]] do the Flood become capable of surviving a direct hit from the shotgun.

In ''Halo 2'', Brutes, [[Councilor]]s and [[Ultra Elites]] are the only ones that can survive a point blank shotgun blast on Normal difficulty. (Hunters can be killed by shooting directly into the orange fleshy openings on their armor). However, on Legendary difficulty any higher than a [[Minor Elite]]'s shielding and health can withstand a point blank shotgun blast (this includes Hunters). Beware, for the [[Flood]] can wield shotguns to devestating effect, since they have an extremly long jumping range. ''Halo 2'' Brutes also wield shotguns.

===Multiplayer Recommendations===
[[Image:Spartan_with_Shotgun.jpg|thumb|175px|A white Spartan wielding a Shotgun in Halo 3.]]
The shotgun's effectiveness in [[multiplayer]] games varies depending on the terrain; indoors and in tight spaces, the shotgun is unbeatable, and some consider it superior to the Energy Sword. Many players carry the shotgun and a weapon that is very effective at medium and above ranges such as the Sniper Rifle, [[Covenant Carbine]],  M6D, or  Battle Rifle, thus making for a more flexible arsenal. Continuous firing by using the magazine and loading one shell then firing does not affect the rate of fire significantly, prompting a few players to employ a tactic dubbed "shotgun sniping" as suppressive fire across medium-sized maps. On the Internet, many games are shotguns only, with most of these battles being set in the map ''[[Battle Creek (Level)|Battle Creek]]'' or the map ''[[Rat Race (Level)|Rat Race]]''. There is a move combo players commonly use with the shotgun: since the enemy players commonly are on the move when being advanced on by a foe with a "special" weapon like the Sword, Rocket Launcher, Shotgun or a vehicle, players with the Shotgun can finish enemies off safely and quickly by shooting them at a decently close range, then striking them with a melee attack immediately afterward, guaranteeing an instant kill. This is often known as the Benton One-Two. This is most effective in ''Halo 3'' due to the more powerful nature of both the shotgun and melee attacks. Also, if a enemy pops right up in your face, the natural way is to get close (probably close enough to touch them) and fire a shell, which, (usually) will end in a instant kill.  Also, most players don't notice a shotgun in enemy hands, and will try to melee you.  When they get close, they've sealed their death. If you encounter someone who snipes you since they know you have the shotgun, get a long range weapon quickly. Shotguns are useless at long range. The shotgun is also the only weapon to be used in the slayer variant [[Tower of Power]]. Best to carry a Battle Rifle with you, or some other medium to long range weapon. If not, have a teammate with you who will have one. Comes in handy for "shotgun combo" which is shooting then bashing immediately after. On the maps [[Snowbound (Level)|Snowbound]] and [[Epitaph (Level)|Epitaph]], many people prefer to wait by shield doors, preparing to ambush and instantly kill those who come through.

====Multiplayer Medals (Halo 3)====
*[[Shotgun Spree Medal]] - Gun down 5 opponents in a row with a shotgun without dying. 
*[[Open Season Medal]] - Gun down 10 opponents in a row with a shotgun without dying.

NOTE: You can only get the Shotgun Spree and Open Season medals if all your kills with the Shotgun are done by the ''blast'' itself, not by the follow-up ''melee'' or any other means that your opponent was finished.

==[[UNSC]] Remarks==
*“The kick is milder with the As—not that it was that bad to begin with—sometimes progress just seems like change, if you catch my meaning.”
*“The adjustable stock on the M90 works just fine, but I’ve got a soft spot in my heart for the [[DTM/Law Enforcement|DTM/LE]] model—old habits die hard I guess."
*“I believe that the sound of racking the pump of a shotgun is universally recognized as ‘kiss your ass goodbye’."
*“The action I saw against the Flood on [[Delta Halo]] was pretty limited—thankfully—and you would think that the M90 would be the ultimate anti-Flood weapon, right? Except that a shotgun is effective because it delivers a massive shock to a delicately balance system of organs and the Flood don’t have that delicately balanced system of organs —it’s like shooting a mike foxtrot tree! All you can really hope to do is disassemble them as rapidly as possible in the correct order.”
*“The shotgun is a specialist weapon—it has its uses, but they are limited. Maybe it is more accurate to call it a tool, as opposed to a weapon?”
[[Image:1221019309 Shotgun.png|thumb|right|The M90 Mk I from [[Halo:CE]].]]

==Character Compatibility==
*[[Spartans]]
*[[Marines]]
*[[Elites]] ([[Halo 2]] and [[Halo 3]])
*[[Brutes]] ([[Halo 2]])
*[[Combat Form|Flood Combat Form]]
**[[Flood Combat Form|Elite]]
**[[Flood Combat Form|Human]]

==Known Users==
*[[James]]
*[[List of characters in Red vs. Blue|Sarge]]
*[[Tomas Navarro]]
*[[John-117]]
*[[Miranda Keyes]]
*[[Jerome-092]]
*[[John Forge]]

==Trivia==
*In ''Halo 3'', a player can make instant kills within close proximity by firing one round of a shotgun and the quickly pressing the B button to melee the vulnerable opponent. It is especially effective when used in conjunction with a [[Power Drain]] or a [[Bubble Shield]]. Also, the Shotgun, next to the Energy Sword, and [[Gravity Hammer]], is useful for killing any known Flood form, even the [[Tank Form]] if you shoot it in the right spot. Moreover, shotgun is slightly more powerful than a [[Mauler]]. At point-blank range, a single shotgun round will kill an enemy, but from a Mauler it will only lower the opponent's shields. However, dual-wielded Maulers are stronger and more effective in close combat situation than a Shotgun, though to melee someone you have to drop a Mauler.
*The Brute [[Mauler]] may have been developed as a direct result of brutes observing the effects of the human shotgun.
*[[Brutes]] have rarely been seen wielding a human shotgun in ''Halo 3''. 
*In ''Halo: Combat Evolved'' and ''Halo 2'', it is said to be a magazine fed weapon, which has caused much speculation as to whether there was a typo. This confusion is a common misconception, however, since Shotguns have an internal, non-detachable magazine which is different than the common assault weapon or sidearms magazine.
*In ''Halo 3'' Matchmaking there is a gametype called [[Shotty Snipers]], where one starts with a Shotgun and a [[Sniper Rifle]]. This gametype is often verbally abused as many players use the Shotgun instead of the Sniper most of the time. There is also another gametype called "[[ShWATguns]]" in Matchmaking where one starts with only a Shotgun and has no shields.
*In [[Halo: The Flood]] it is stated that the M90 fires a twelve gauge shell, whereas in the Halo game manuals it states that the M90 fires an eight gauge shell.
*The shotguns in the [[Halo]] universe are actually inferior to many real shotguns we have now. For example, today we have 10 gauge semi-automatic and even fully automatic, detachable magazine (making for a fraction of the reload time) shotguns that have much less recoil, tighter shot spread and longer ballistic range than the ones in the Halo games; however, the shotguns in Halo are eight gauge and thus cause more damage. This is probably due to balancing issues, as an automatic shotgun would be unstoppable at close range.
*In the [[Machinima]] [[Red vs. Blue]], Sarge sports the M90 as his primary weapon.
*Although Flood Combat Forms only use the shotgun with their right hand, they can still repeatedly fire the shotgun without racking the slide.
*The M90A close assault weapon system costs cR 2,200.

==References==
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{{UNSC Infantry Weapons}}
[[Category:Held Weapons]]
[[Category:Human Weapons]]
[[Category:UNSC]]
[[Category:Weapons]]