Editing M870 Rampart point defense gun

{{Status|Canon}}
{{Disambig header|the star system|other uses of the term "rampart"|Rampart (disambiguation)}}
{{Weapon infobox
|image= [[File:H3 - M870 Rampart.JPG|300px]]
|manufacturer=
|series= 
|type= [[Point defense gun]]
|cost=
|variant= 
|affiliation= [[UNSC Navy]]
|weight=
|ammotype= *50mm sub-caliber armor-piercing sabots{{Ref/Book|Id=Warfleet 39|HWF|Page=39}}
*50mm proximity detonation fragmentation shells{{Ref/Reuse|Warfleet 39}}
|feed=
|operation= 
|rate= High
|velocity=
|range= Long
|service=*[[Human-Covenant war]]
*[[Post-Covenant War conflicts]]
}}
The '''M870 Rampart point defense gun''' is a weapon system utilized by warships of human make, most commonly those of the [[UNSC Navy]]. They function as part of a ship-wide [[Point-defense gun|defensive network]].{{Ref/Site|Id=WaypointFrigate|URL=https://www.halowaypoint.com/en-us/universe/vehicles/unsc-frigate|Site=Halo Waypoint|Page=UNSC Frigate|D=30|M=06|Y=2021}} 

==Overview==
As is standard for human point-defense guns, the M870 Rampart turret is fully automated due to the inability of humans to calculate firing solutions fast enough for the role of the weapon,{{Ref/Book|Id=Warfleet19|HWF|Page=19}} and consists of twin-{{Ref/Game|H3|''Charon''-class frigate in-game model}} or quad-mounted 50mm{{Ref/Reuse|WaypointFrigate}} rapid-fire coilguns and a targeting scanner.{{Ref/Reuse|Warfleet 39}} Point defense guns such as these are used for the engagement of incoming threats, including the warding off of strikecraft and the disruption of [[plasma torpedo]]es;{{Ref/Reuse|Warfleet19}} each emplacement actively switches between sub-caliber armor-piercing sabots or proximity detonation fragmentation shells based on a threat-analysis of its current target in order to maximise effectiveness.{{Ref/Reuse|Warfleet 39}}

==Usage==
M870s are most commonly mounted on lighter vessels of the [[UNSC Navy]] and [[CMA Navy]], particularly [[UNSC corvette|corvettes]] and [[UNSC frigate|frigate]]s.  They also see some use on [[UNSC destroyer|destroyers]] and [[UNSC carrier|carriers]], with no known usage on [[cruiser]]s and [[supercarrier]]s. They are primarily employed on the warships constructed between the late-[[:Category:24th century|24th century]] and early [[:Category:26th century|26th century]], with their earliest known usage being on the {{Class|Mako|corvette}}, launched in [[2388]].{{Ref/Book|Id=Enc22Corvettes|Enc22|Page=128-129}} They seem to have been mostly succeeded aboard larger and more modern ships by the [[M910 Rampart point defense network|M910 Rampart]] model, which began to see service aboard the {{Class|Valiant|super-heavy cruiser}} in [[2493]]{{Ref/Book|Enc22|Page=118}}

Despite this, the M870 did see constant usage as a common fixture in the [[Human-Covenant War]] of the early-mid 26th century, and a handful of [[Post-Covenant War conflicts|post-war era]] vessels have made use of it.

;Carriers
*{{Class|Epoch|heavy carrier}} - 12x M870 Ramparts{{Ref/Book|Id=Warfleet 40|HWF|Page=40}}{{Ref/Book|Id=Enc22Carriers|Enc22|Page=127}}
*{{Class|Orion|assault carrier}} - 12x M870 Ramparts{{Ref/Reuse|Enc22Carriers}}
*{{Class|Poseidon|light carrier}} - 20x M870 Ramparts{{Ref/Reuse|Enc22Carriers}}

;Destroyers
*{{Class|Hillsborough|heavy destroyer}} - 7x M870 Ramparts{{Ref/Book|Id=Enc22Destroyers|Enc22|Page=124-125}}
*{{Class|Halberd|light destroyer}} - 4x M870 Ramparts{{Ref/Reuse|Enc22Destroyers}}{{Ref/Book|Id=Warfleet 32|HWF|Page=32}}

;Frigates
*{{Class|Charon|light frigate}} - 4x M870 Ramparts{{Ref/Site|Id=Bulletin 10.10.12|URL=http://blogs.halowaypoint.com/Headlines/post/2012/10/10/The-Halo-Bulletin-101012-.aspx|Site=Waypoint|Page=The Halo Bulletin: 10.10.12|D=30|M=03|Y=2013}}{{Ref/Book|Id=Enc22Frigates|Enc22|Page=120-123}}
*{{Class|Mulsanne|light frigate}} - 12x M870 Ramparts{{Ref/Reuse|Enc22Frigates}}
*{{Class|Paris|heavy frigate}} - 12x M870 Ramparts{{Ref/Reuse|Enc22Frigates}}
*{{Class|Stalwart|light frigate}} - 6x M870 Ramparts{{Ref/Reuse|Enc22Frigates}}{{Ref/Book|Id=Warfleet 37|HWF|Page=37}}
*{{Class|Strident|heavy frigate}} - 6x M870 Ramparts{{Ref/Reuse|Enc22Frigates}}{{Ref/Reuse|Warfleet 39}}

;Corvettes
*{{Class|Gladius|heavy corvette}} - 6x M870 Ramparts{{Ref/Reuse|Warfleet19}}{{Ref/Reuse|Enc22Corvettes}}
*{{Class|Mako|corvette}} - 2x M870 Ramparts{{Ref/Reuse|Enc22Corvettes}}
*{{Class|Scholte|missile corvette}} - 4x M870 Ramparts{{Ref/Site|Id=CFFoundations|URL=https://www.halowaypoint.com/news/canon-fodder-foundations|Site=Halo Waypoint|Page=Canon Fodder - Foundations|D=12|M=01|Y=2022}}

;Prowlers
*{{Class|Razor|prowler}} - 2x M870 Ramparts{{Ref/Reuse|Enc22Corvettes}}

==Gallery==
<gallery>
File:M870 Rampart.jpg|A non-canon depiction of M870 Rampart point defense guns on the ''Halo 4'' design of the {{UNSCShip|Forward Unto Dawn}}.
File:HW assets M870 Rampart turret.png|Quad-mount M870s on the {{Class|Strident|heavy frigate}}.
</gallery>

==List of appearances==
*''[[Halo 2]]'' {{1st}}
*''[[Halo 3]]''
*''[[Halo 3: ODST]]''
*''[[Halo Legends]]''
**''[[Origins]]'' 
*''[[Halo 4: Forward Unto Dawn]]''
*''[[Halo 4]]''
**''[[Spartan Ops]]''
*''[[Halo 2 Anniversary]]''
*''[[Halo Infinite]]''
*''[[Halo: The Rubicon Protocol]]''

==Sources==
{{Ref/Sources}}

{{UNSC heavy weapons}}
[[Category:Autocannons]]
[[Category:Starship weapons]]
[[Category:UNSC naval weapons]]