Mark 38 25 mm machine gun system

{{Infobox weapon | name = Mark 38 25 mm machine gun system | image = Firing a Mk 38 25mm autocannon by remote control -160301-N-VE959-131 (25434908752).jpg | caption = {{USS|Gonzalez}} fires her starboard-side Mk 38 Mod 2. | origin = United States | type = Naval gun turret with remote and/or manual control | service = 1986–present | designer = {{plainlist| * Crane Division, Naval Surface Warfare Center (Mods 0–1) * BAE Systems (Mods 2–3) * MSI-Defence (Mod 4) }} | variants = 5 (Mods 0–4) | weight = {{plainlist| * Gun: {{convert|109|kg|lb|abbr=on}} * Turret: {{convert|1,042|kg|lb|abbr=on}} unloaded }} | crew = {{plainlist| * 1 for operation (manual or remote control) * 2 for maintenance }} | caliber = 25 mm (1 inch) | cartridge = 25 × 137 mm | range = {{convert|2500|m|ft|abbr=off|sp=us}} | max_range = {{convert|6800|m|ft|abbr=off|sp=us}} | rate = Semi, burst, or auto (up to 180 rpm (3 rps)) | is_artillery = yes | is_ranged = yes | velocity = {{plainlist| * APDS, APDS-T: {{convert|1,345|m/s|ft/s|}} * HEI, HEI-T: {{convert|1,100|m/s|ft/s|}} }} | guidance = {{plainlist| * Mods 0–1: Manually controlled * Mods 2–3: Remotely operated with EO/IR sight, laser rangefinder, and auto-tracking; can also be manually controlled }} | is_vehicle = yes | traverse = +/-15° to +/-165° | elevation = -15° to +55° | used_by = See ''operators'' }}

The '''Mark 38 25 mm machine gun system (MGS)''' is a shipboard weapon system designed to protect warships primarily from a variety of surface threats, especially small, fast surface craft.<ref name=":1">{{Cite web |title=MK 38 – 25 mm Machine Gun System |url=https://www.navy.mil/Resources/Fact-Files/Display-FactFiles/Article/2167836/mk-38-25-mm-machine-gun-system/ |url-status=live |archive-url=https://web.archive.org/web/20201218043704/https://www.navy.mil/Resources/Fact-Files/Display-FactFiles/Article/2167836/mk-38-25-mm-machine-gun-system/ |archive-date=December 18, 2020 |access-date=October 3, 2022 |website=www.navy.mil |language=en-US}}</ref> It consists of an M242 Bushmaster chain gun mounted on a turret that can be either manually or remote controlled, depending on variant.<ref name=":02">{{Cite web |title=MK 38 25-mm machine gun |url=https://man.fas.org/dod-101/sys/ship/weaps/mk-38.htm |url-status=live |archive-url=https://web.archive.org/web/20211127113749/https://man.fas.org/dod-101/sys/ship/weaps/mk-38.htm |archive-date=November 27, 2021 |access-date=October 3, 2022 |website=man.fas.org}}</ref><ref name=":7">{{Cite web |date= |title=25 mm/87 Mark 38 Machine Gun System |url=http://navweaps.com/Weapons/WNUS_25mm_mk38.php |url-status=live |archive-url=https://web.archive.org/web/20220121112354/http://www.navweaps.com/Weapons/WNUS_25mm_mk38.php |archive-date=January 21, 2022 |access-date=October 3, 2022 |website=NavWeaps}}</ref> Originally designed by the United States in the 1980s for use on their warships,<ref name=":7" /> the Mark 38 is today in service on warships of various NATO countries.<ref name=":3">{{Cite web |title=Mk 38 Mod 3 Machine Gun System (MGS) |url=https://www.baesystems.com/en-us/product/mk-38-machine-gun-system |url-status=live |archive-url=https://web.archive.org/web/20220121141403/https://www.baesystems.com/en-us/product/mk-38-machine-gun-system |archive-date=January 21, 2022 |access-date=October 3, 2022 |website=BAE Systems {{!}} United States |language=en}}</ref>

== Description == The Mark 38 25''' '''mm MGS provides ships with short-range capability against high-speed maneuvering surface targets (HSMSTs),<ref name=":2">{{cite web |title=MK 38 – 25 MM MACHINE GUN SYSTEM |url=https://www.navy.mil/navydata/fact_display.asp?cid=2100&tid=500&ct=2 |url-status=dead |archive-url=https://web.archive.org/web/20181103001136/https://www.navy.mil/navydata/fact_display.asp?cid=2100&tid=500&ct=2 |archive-date=November 3, 2018 |access-date=October 5, 2022 |website=www.navy.mil}}</ref> floating mines, and enemy swimmers. Ships close to land can use the system against enemy personnel and lightly armored vehicles.<ref name=":02" /> It is a low-cost weapon that can operate in any weather condition, day or night. The Mk 38 MGS can be permanently or temporarily installed on warships for their deployment requirements.<ref name=":7" />

The initial variants of the Mark 38, Mods 0 and 1, were unstabilized and required one crewmember to manually operate. The latest Mods 2 and 3 feature stabilization and remote control ability.<ref name=":5">{{Cite web |title=Mk 38 |url=https://www.deagel.com/Cannons%20%26%20Gear/Mk%2038/a001367 |url-status=live |archive-url=https://web.archive.org/web/20221005072606/https://www.deagel.com/Cannons%20%26%20Gear/Mk%2038/a001367 |archive-date=October 5, 2022 |access-date=October 3, 2022 |website=www.deagel.com }}</ref> All variants of the Mk 38 require two crewmembers for conducting maintenance (e.g., replacing the Bushmaster in the event it malfunctions, which takes five minutes).<ref name=":02" />

=== Components ===

==== M242 Bushmaster ==== {{Main|M242 Bushmaster|l1 = M242 Bushmaster}}

The primary component of the Mk 38 is the 25 mm M242 Bushmaster. It is an externally-powered, chain-driven gun. The Bushmaster uses an electric motor to drive the moving parts for ammunition feeding, loading, firing, extraction, and cartridge ejection.<ref name=":02" /> The mass of the M242 on the Mark 38 MGS is {{convert|109|kg|lb|abbr=on}}.<ref name=":7" />

The Mk 38's Bushmaster can fire all U.S. Navy-approved 25 mm ammunition,<ref name=":3" /> including:

* '''APDS''' – armour-piercing discarding sabot * '''APDS-T''' – armor-piercing discarding sabot with tracer * '''HEI''' – high-explosive incendiary * '''HEI-T''' – high-explosive incendiary with tracer and self-destruct * '''SAPHEI''' – semi-armor-piercing high-explosive incendiary * '''SAPHEI-T''' – semi-armor-piercing high-explosive incendiary with tracer * '''FAPDS-T''' – frangible armor-piercing discarding sabot with tracer<ref name=":7" /> It has a single-shot semi-automatic mode, for single shots; a burst mode, for a few shots at a time; a low-rate fully automatic (LRFA) mode, for a rate of fire (ROF) of about 100 rounds per minute (RPM); and a high-rate fully automatic (HRFA) mode, for a maximum ROF of about 200 RPM. The Mk 38 MGS can realistically sustain about 180 RPM while on HRFA.<ref name=":1" /> The weapon's muzzle velocity is {{cvt|1,345|m/s}} for armor-piercing ammunition or {{cvt|1,100|m/s}} for high-explosive ammunition. The M242's maximum firing range is {{convert|6800|m|yd|abbr=off|sp=us}}, with an effective firing range of about {{convert|3000|m|yd|abbr=off|sp=us}}. However, the Mk 38 has an estimated effective firing range of about {{convert|2500|m|yd|abbr=off|sp=us}}.<ref name=":7" /> thumb|Maintenance is performed on a Mk 38 Mod 2 aboard {{USS|Bataan|LHD-5|6}}

==== Machine gun mounting (MGM) ==== Different machine gun mountings are used, depending on the variant of the Mark 38. All MGMs share the same traverse of +/−15 to +/−165 degrees and enable the M242 Bushmaster to elevate from −15 to +55 degrees.<ref name=":0">{{Cite web |title=Mk-38 Machine Gun System (MGS) |url=https://www.seaforces.org/wpnsys/SURFACE/Mk-38-machine-gun-system.htm |url-status=live |archive-url=https://web.archive.org/web/20210621162144/https://www.seaforces.org/wpnsys/SURFACE/Mk-38-machine-gun-system.htm |archive-date=June 21, 2021 |access-date=October 3, 2022 |website=www.seaforces.org}}</ref> The inability to elevate higher than 55 degrees limits the Mark 38 MGS in the anti-aircraft role.<ref name=":6">{{Cite web |title=MK-38 25-mm Machine Gun |url=https://www.navysite.de/weapons/mk-38.htm |url-status=live |archive-url=https://web.archive.org/web/20210125215641/https://www.navysite.de/weapons/mk-38.htm |archive-date=January 25, 2021 |access-date=October 3, 2022 |website=www.navysite.de}}</ref>

Mark 38 Mods 0 and 1 use the Mark 88 machine gun mounting. It was manually trained—requiring a crewmember to physically operate—and lacked stabilization, both of which reduced targeting effectiveness.<ref name=":7" />

A few Mark 38 machine gun systems use the Mark 96 Mod 0 machine gun mounting. This MGM features both an M242 Bushmaster and a 40 mm Mark 19 grenade launcher. It also has stabilization—it automatically moves to compensate for pitch and roll of the ship. However, like on Mk 38 Mods 0 and 1, this mounting required someone to physically operate.<ref name=":7" /> [[File:USS Sterett (DDG 104) 141022-N-GW139-030 (15443523667).jpg|thumb|Remote operation of a Mk 38 Mod 2 aboard USS ''Sterett'' (DDG-104)]] As a result, the Navy developed an improved version MGM for use on the next variant of the Mk 38 MGS. The Mk 38 Mod 2 mounting, also known as the Typhoon Weapon System,<ref>{{Cite web |title=Typhoon Naval Stabilized & Remotely Operated Gun System |url=http://www.rafael.co.il/marketing/SIP_STORAGE/FILES/1/941.pdf |url-status=dead |archive-url=https://web.archive.org/web/20121202130720/http://www.rafael.co.il/marketing/SIP_STORAGE/FILES/1/941.pdf |archive-date=December 2, 2012 |access-date=October 5, 2022}}</ref> features remote control capability, meaning that the operator can safely control the system from within the ship's Combat information center. Two different ammunition types can be loaded into the system, and the operator can select which one to use from their console. Other changes include a new electro-optical/infrared (EO/IR) sight, laser rangefinder, improved man/machine interfaces, and auto-tracking capability. Tests demonstrated that the Mod 2 mounting has a three times greater probability of hit versus previous variants.<ref name=":3" /><ref name=":7" />

The latest Mk 38 Mod 3 mounting has further upgraded interfaces and control consoles. The EO/IR sensor and laser rangefinder, integrated with the system's fire-control system, provide a 330-degree view, "even in extremely low light conditions". The surveillance system can move independently of the turret itself, intended to minimize attention drawn from targets. In addition to the 25 mm M242 Bushmaster, the Mod 3 can optionally mount a coaxial 7.62 mm Bushmaster Mark 52 chain gun, which has a ROF of 500–600 RPM.<ref name=":3" /><ref name=":7" /><ref>{{cite web |title=Contracts for June 29, 2018 |url=https://www.defense.gov/Newsroom/Contracts/Contract/Article/1564122/ |url-status=dead |archive-url=https://web.archive.org/web/20210830111456/https://www.defense.gov/Newsroom/Contracts/Contract/Article/1564122/ |archive-date=August 30, 2021 |access-date=October 5, 2022 |website=United States Department of Defense |publisher=U.S. Department of Defense}}</ref><ref>{{Cite web |title=7.62 mm Bushmaster Chain Gun Mark 52 |url=http://navweaps.com/Weapons/WNUS_762_Chaingun_mk52.php |url-status=live |archive-url=https://web.archive.org/web/20160905201742/http://www.navweaps.com/Weapons/WNUS_762_Chaingun_mk52.php |archive-date=September 5, 2016 |access-date=October 5, 2022 |website=NavWeaps}}</ref>

== Variants == {| class="sortable wikitable" !Mod !Mounting !Notes |- |Mark 38 MGS Mod 0 |Mark 88 | * Initial variant, not mass-produced * Unstabilized * Requires a user to physically operate |- |Mark 38 MGS Mod 1 |Mark 88 | * First mass-produced variant

|- |N/A |Mark 96 Mod 0 | * Only variant to feature a Mk 19 grenade launcher * Stabilization: compensates for ship's pitch/roll |- |Mark 38 MGS Mod 2 |Mark 38 Mod 2 | * Also known as the Typhoon Weapon System * Remote control capability * Electro-optical/infrared (EO/IR) sight * Laser rangefinder * Fully stabilized * Improved ammunition loading * Improved interfaces |- |Mark 38 MGS Mod 3 |Mark 38 Mod 3 | * Independently-moving surveillance system * Improved fire-control * Improved multi-function display * New control console * Option to mount coaxial 7.62 mm chain gun |- |Mark 38 MGS Mod 4 |Mark 38 Mod 4 | * Option to mount coaxial 0.50-cal M2HB heavy machine gun * Revised power system |}

== History == In 1977, the U.S. Chief of Naval Operations (CNO) decided that the Oerlikon 20 mm Mk 16 guns would need to be replaced. They had high maintenance demands and did not use standard NATO ammunition; they had become obsolete.<ref name=":7" /> In the 1970s, Hughes Helicopters had developed the new 25 mm M242 Bushmaster chain gun for the Army, which the Navy chose to adopt for their new weapon, the Mark 38 25 mm Machine Gun System.<ref name=":6" /> The Crane Division of the Naval Surface Warfare Center was responsible for designing and manufacturing the Mark 88 mounting. In 1986, the Mark 38 MGS Mod 0 was introduced.<ref name=":4">{{Cite web |last= |date=July 5, 2022 |title=BAE Systems MK 38 MOD 3 Machine Gun System (MGS) |url=https://militaryleak.com/2022/07/05/bae-systems-mk-38-mod-3-machine-gun-system-mgs/ |url-status=live |archive-url=https://web.archive.org/web/20220706111351/https://militaryleak.com/2022/07/05/bae-systems-mk-38-mod-3-machine-gun-system-mgs/ |archive-date=July 6, 2022 |access-date=October 3, 2022 |website=MilitaryLeak |language=en-US}}</ref> The Navy did not evaluate the weapon for operational use until the summer of 1987, and the Mark 38 Mod 1 went into service in 1988. With the imminent Persian Gulf War, production of the Mod 1 was accelerated.<ref name=":7" />thumb|A Mk 38 Mod 1 being operated aboard {{USS|Ingraham|FFG-61|6}}The Mk 38 saw its first use aboard warships and auxiliaries deployed to the Middle East in support of Operations Desert Shield and Desert Storm. The Mod 1s were frequently installed only for temporary durations aboard vessels, rotated among ships based on mission priorities.<ref name=":0" /> Between FY1986 and FY1992, the USN purchased 243 Mark 38 25 mm Machine Gun Systems.<ref name=":7" />

In October 2000, {{USS|Cole|DDG-67|6}} was bombed in an attack by a small boat. The incident led to the recognition of an upgraded Mk 38 MGS as a means to improve shipboard protection against the threat of small surface craft. In 2003, the CNO coordinated the development and procurement of the Mark 38 Mod 2.<ref name=":0" /> On June 8, 2004, United Defense (acquired by BAE Systems) received a $395.5 million contract to produce the Mod 2.<ref name=":5" />

In March 2011, the U.S. Navy awarded a contract to BAE Systems to develop a variant of the Mod 2 with a directed energy system, referred to as the Mk 38 Mod 2 Tactical Laser System. By July, it was announced that BAE was teaming with Boeing on the project. Boeing is supplying the laser components for the system. The Mk 38 Mod 2 TLS is intended to be able to hit both surface and air targets like UAVs. The original demonstrator called for a 10 kW laser, but after the USN indicated interest in a more powerful weapon, by 2017 the proposed laser had been upscaled to 60 kW.<ref name=":5" /><ref>{{Cite web |title=SAS 2017: BAE Systems Unveils a 60 kW Variant of the MK 38 Tactical Laser System |url=https://www.armyrecognition.com/archives/archives-naval-defense/naval-defense-2017/sas-2017-bae-systems-unveils-a-60-kw-variant-of-the-mk-38-tactical-laser-system |url-status=live |archive-url=https://web.archive.org/web/20170406021925/http://navyrecognition.com/index.php/news/naval-exhibitions/2017/sea-air-space-2017-show-daily-news/5054-sas-2017-bae-systems-unveils-a-60-kw-variant-of-the-mk-38-tactical-laser-system.html |archive-date=April 6, 2017 |access-date=October 5, 2022 |website=navyrecognition.com|date=April 4, 2017 }}</ref>

In July 2012, the Mark 38 MGS program was further expanded, resulting in the Mark 38 Mod 3, the latest variant of the system.<ref name=":2" /> The Mod 3 is currently being fielded by BAE under a separate program from the TLS program.<ref name=":7" />

[[File:USS Mustin conducts a live-fire exercise with a Mk 38 Mod 4 machine gun.jpg|thumb|A Mk 38 Mod 4 being fired aboard USS Mustin (DDG-89)]] In FY2019, a Maritime Accelerated Acquisition program was started to procure the Mod 4 variant of the Mark 38.<ref name=":8">{{Cite web |title=Rapid Prototyping, Experimentation & Dem |url=https://www.stratvocate.com/files/2021/RDTEN_BA4_Book-p1235/RDTEN_BA4_Book.html |url-status=live |archive-url=https://web.archive.org/web/20221210061231/https://www.stratvocate.com/files/2021/RDTEN_BA4_Book-p1235/RDTEN_BA4_Book.html |archive-date=2022-12-10 |access-date=2022-12-10 |website=www.stratvocate.com |publisher=Department of Defense}}</ref><ref>{{Cite web |title=Department of Defense: Fiscal Year (FY) 2021 Budget Estimates |url=https://www.secnav.navy.mil/fmc/fmb/Documents/21pres/PANMC_BOOK.pdf |url-status=live |archive-url=https://web.archive.org/web/20221114034054/https://www.secnav.navy.mil/fmc/fmb/Documents/21pres/PANMC_BOOK.pdf |archive-date=2022-11-14 |access-date=2022-12-10 |website=www.secnav.navy.mil |publisher=Department of Defense}}</ref> The program was created to address "unmanned aerial systems (UAS) and high speed maneuverable unmanned surface vehicle (USV) threats".<ref name=":8" /> Mod 4 will incorporate the 30 mm Mk44 Bushmaster II instead of the 25 mm M242 Bushmaster of previous variants.<ref name=":9">{{Cite web |last=Ong |first=Peter |date=April 21, 2022 |title=USGC's Polar Security Cutters to Receive Mark 38 Mod 4 Guns |url=https://www.navalnews.com/naval-news/2022/04/usgcs-cutters-to-receive-30mm-mark-44/ |url-status=live |archive-url=https://web.archive.org/web/20220522130754/https://www.navalnews.com/naval-news/2022/04/usgcs-cutters-to-receive-30mm-mark-44/ |archive-date=2022-05-22 |access-date=2022-12-10 |website=Naval News |language=en-US}}</ref> This is intended to improve accuracy, increase lethality, and increase effective range. In 2021, MSI-Defence begun delivery of its Seahawk DS30M A2 30 mm gun mount to the USN for testing and qualification for the Mod 4.<ref>{{Cite web |last=Scott |first=Richard |title=MSI-Defence begins deliveries for MK 38 Mod 4 GWS programme |url=https://www.janes.com/defence-news/news-detail/msi-defence-begins-deliveries-for-mk-38-mod-4-gws-programme |url-status=live |archive-url=https://web.archive.org/web/20211107221433/https://www.janes.com/defence-news/news-detail/msi-defence-begins-deliveries-for-mk-38-mod-4-gws-programme |archive-date=2021-11-07 |access-date=2022-12-10 |website=Janes.com |date=November 4, 2021 |language=en}}</ref> The Mk 38 Mod 4 will achieve initial operating capability on ''Arleigh Burke''-class destroyers with Aegis Baseline 9 in FY2022.<ref name=":8" /> The USCG also intends to acquire the Mk 38 Mod 4 for installation on its future Polar Security Cutters.<ref name=":9" />

The USS Mustin is the first Arleigh Burke-class destroyer to receive the Mk 38 Mod 4 and conducted a live fire exercise in the South China Sea on April 17, 2026.<ref>{{Cite web |title=US Navy completes first MK 38 MOD 4 GWS install |url=https://www.navalnews.com/event-news/sea-air-space-2024/2024/04/us-navy-completes-first-mk-38-mod-4-gws-install/ |website=navalnews.com |date=November 4, 2024}}</ref> <ref>{{Cite web |title=USS Mustin conducts a live-fire exercise with a Mk 38 Mod 4 machine gun |url=https://www.dvidshub.net/image/9659053/uss-mustin-conducts-live-fire-exercise-with-mk-38-mod-4-machine-gun |website=DVIDS |date=May 4, 2024}}</ref>

== Operators == {| class="wikitable" style=";" !Country !Organization(s) !Platforms |- |{{flag|Australia}} |{{navy|Australia}} |{{sclass|Armidale|patrol boat|1}}, {{sclass|Canberra|landing helicopter dock|1}}, {{sclass|Hobart|destroyer|1}}<ref>{{cite book |url=https://books.google.com/books?id=TJunjRvplU4C |title=The Naval Institute Guide to Combat Fleets of the World: Their Ships, Aircraft, and Systems |publisher=Naval Institute Press |year=2007 |isbn=978-1-59114-955-2 |editor=Wertheim, Eric |edition=15th |location=Annapolis, MD |page=22 |oclc=140283156 |access-date=October 5, 2022 |archive-url=https://web.archive.org/web/20140706135825/http://books.google.com/books?id=TJunjRvplU4C |archive-date=July 6, 2014 |url-status=live}}</ref> |- |{{flag|Canada}} |{{navy|Canada}} |{{sclass|Harry DeWolf|offshore patrol vessel|1}}<ref>{{Cite web |last= |first= |date= April 19, 2013|title=Harry DeWolf class |url=https://www.canada.ca/en/navy/corporate/fleet-units/surface/harry-dewolf-class.html |url-status=live |archive-url=https://web.archive.org/web/20220725144340/https://www.canada.ca/en/navy/corporate/fleet-units/surface/harry-dewolf-class.html |archive-date=2022-07-25 |access-date=2022-12-10 |website=www.canada.ca}}</ref> |- |{{flag|Georgia}} |{{coast guard|Georgia}} |{{sclass2|Island|patrol boat|1}}<ref name=":10">{{Cite web |first= |date=October 1, 2016 |title=U.S. Donates Two Patrol Boats to Georgian Coast Guard |url=http://civil.ge/eng/article.php?id=29475 |url-status=live |archive-url=https://web.archive.org/web/20171212193627/http://www.civil.ge/eng/article.php?id=29475 |archive-date=December 12, 2017 |access-date=December 10, 2022 |website=old.civil.ge}}</ref> |- |{{flag|Philippines}} |{{navy|Philippines}} |{{sclass|Del Pilar|offshore patrol vessel|1}}, Jacinto-class patrol vessel, ''Mariano Alvarez''-class coastal patrol vessel, {{sclass|Jose Andrada|patrol craft|1}}<ref name=JanesFS1314>{{cite book |last=Saunders |first=Stephen |date=2013 |title=IHS Jane's Fighting Ships 2013–2014 |publisher=IHS |page=614 |isbn=978-0-7106-3048-3}}</ref><ref>{{Cite web |title=About Us |url=https://www.surflant.usff.navy.mil/Organization/Operational-Forces/Destroyers/1/Patrol-Coastal-Ships/USS-Tempest-PC-2/ |url-status=live |archive-url=https://web.archive.org/web/20221210063843/https://www.surflant.usff.navy.mil/Organization/Operational-Forces/Patrol-Coastal-Ships/USS-Tempest-PC-2/About-Us/ |archive-date=2022-12-10 |access-date=2022-12-10 |website=www.surflant.usff.navy.mil}}</ref> |- |{{flag|Singapore}} |{{navy|Singapore}} |{{sclass|Endurance|landing platform dock|1}}, {{sclass|Formidable|frigate|1}}<ref name="RSN">{{cite web |date= |title=Our Weapons |url=http://www.mindef.gov.sg/imindef/mindef_websites/atozlistings/navy/assets/weapons.html |url-status=dead |archive-url=https://web.archive.org/web/20160327132913/http://www.mindef.gov.sg/imindef/mindef_websites/atozlistings/navy/assets/weapons.html |archive-date=March 27, 2016 |access-date=September 15, 2010 |publisher=Ministry of Defence (Singapore)}}</ref><ref>{{Cite web |last=Lundquist |first=Edward |date=July 13, 2013 |title=Singapore's Formidable-class Frigates |url=https://www.defensemedianetwork.com/stories/singapores-formidable-class-frigates/ |url-status=live |archive-url=https://web.archive.org/web/20220120130430/https://www.defensemedianetwork.com/stories/singapores-formidable-class-frigates/ |archive-date=2022-01-20 |access-date=2022-12-10 |website=Defense Media Network |language=en-US}}</ref> |- |{{flag|Spain}} |{{navy|Spain}} |{{sclass|Meteoro|offshore patrol vessel|1}}<ref>{{Cite web |date=December 27, 2016 |title=MGS MGS MK-38 MOD. 2 |url=https://www.buquesdeguerra.com/en/ships-spanish-navy/patrol-vessels/meteoro-class/tag/Mk38.html |url-status=live |archive-url=https://web.archive.org/web/20221210070248/https://www.buquesdeguerra.com/en/ships-spanish-navy/patrol-vessels/meteoro-class/tag/Mk38.html |archive-date=2022-12-10 |access-date=2022-12-10 |website=www.buquesdeguerra.com |language=en}}</ref> |- |{{flag|Sri Lanka}} |{{navy|Sri Lanka}} |{{sclass|Hamilton|cutter|1}}, {{sclass2|Reliance|cutter|1}} |- | rowspan="2" |{{flag|United States}} |{{navy|United States}} |{{sclass|America|amphibious assault ship|1}}, {{sclass|Arleigh Burke|destroyer|1}}, {{sclass|Blue Ridge|command ship|1}}, {{sclass|Emory S. Land|submarine tender|1}}, {{sclass|Harpers Ferry|dock landing ship|1}}, {{sclass|Gerald R. Ford|aircraft carrier|1}}, Mark VI patrol boat, {{sclass|Nimitz|aircraft carrier|1}}, {{sclass|Ticonderoga|cruiser|1}}, {{sclass|Wasp|amphibious assault ship|1}}, {{sclass|Whidbey Island|dock landing ship|1}}<ref name=":1" /> |- |{{coast guard|United States}} |{{sclass2|Heritage|cutter|1}}, {{sclass2|Reliance|cutter|1}}, {{sclass2|Sentinel|cutter|1}}<ref name=":1" /> |- |{{flag|Ukraine}} |{{Navy|Ukraine}} |{{sclass2|Island|patrol boat|1}}<ref>{{cite web |title=Ukraine to receive two former U.S. Coast Guard Island-class cutters |url=https://navaltoday.com/2018/04/03/ukraine-to-receive-two-former-us-coast-guard-island-class-cutters/ |website=navaltoday.com |date=3 April 2018 |access-date=18 March 2023 |archive-url=https://web.archive.org/web/20180614045641/https://navaltoday.com/2018/04/03/ukraine-to-receive-two-former-us-coast-guard-island-class-cutters/ |archive-date=14 June 2018 |url-status=live }}</ref> |} The Mk 38 MGS is also used on offshore support vessels.<ref name=":1" />

== References == {{Reflist}}

== External links == * [https://www.baesystems.com/en-uk/product/mk-38-machine-gun-system Mk 38 Mod 3 Machine Gun System (MGS) | BAE Systems]

Category:Autocannon Category:Cold War weapons of the United States Category:Military equipment introduced in the 1980s Category:25 mm artillery Category:Naval guns of the United States Category:Remote weapon stations Category:Equipment of the United States Navy