M242 Bushmaster 25 mm chain gun
E383516
The M242 Bushmaster 25 mm chain gun is a widely used, externally powered autocannon known for its reliability and versatility on armored vehicles and naval platforms.
All labels observed (4)
| Label | Occurrences |
|---|---|
| 25 mm M242 Bushmaster chain gun | 1 |
| Bushmaster II 30 mm chain gun | 1 |
| Bushmaster III 35/50 mm chain gun | 1 |
| M242 Bushmaster 25 mm chain gun canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3732060 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: M242 Bushmaster 25 mm chain gun Context triple: [Light Armored Vehicle-25, armamentPrimary, M242 Bushmaster 25 mm chain gun]
-
A.
M230 30 mm chain gun
The M230 30 mm chain gun is a single-barrel, electrically driven automatic cannon primarily used on attack helicopters for high-rate, accurate fire against ground targets.
-
B.
M61A1 Vulcan 20 mm cannon
The M61A1 Vulcan 20 mm cannon is a six-barreled, electrically driven Gatling-style rotary cannon widely used on modern fighter aircraft for high-rate-of-fire air-to-air and air-to-ground engagements.
-
C.
HK21 machine gun
The HK21 machine gun is a German-designed, belt-fed general-purpose machine gun developed by Heckler & Koch and based on the G3 rifle’s roller-delayed blowback system.
-
D.
7.62 mm M240 machine gun
The 7.62 mm M240 machine gun is a belt-fed, gas-operated general-purpose machine gun widely used by U.S. and NATO forces for infantry support and as a mounted weapon on vehicles and aircraft.
-
E.
M60 machine gun
The M60 machine gun is a 7.62×51mm NATO general-purpose machine gun developed by the United States and widely used by its military forces from the late 1950s onward.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: M242 Bushmaster 25 mm chain gun Target entity description: The M242 Bushmaster 25 mm chain gun is a widely used, externally powered autocannon known for its reliability and versatility on armored vehicles and naval platforms.
-
A.
M230 30 mm chain gun
The M230 30 mm chain gun is a single-barrel, electrically driven automatic cannon primarily used on attack helicopters for high-rate, accurate fire against ground targets.
-
B.
M61A1 Vulcan 20 mm cannon
The M61A1 Vulcan 20 mm cannon is a six-barreled, electrically driven Gatling-style rotary cannon widely used on modern fighter aircraft for high-rate-of-fire air-to-air and air-to-ground engagements.
-
C.
HK21 machine gun
The HK21 machine gun is a German-designed, belt-fed general-purpose machine gun developed by Heckler & Koch and based on the G3 rifle’s roller-delayed blowback system.
-
D.
7.62 mm M240 machine gun
The 7.62 mm M240 machine gun is a belt-fed, gas-operated general-purpose machine gun widely used by U.S. and NATO forces for infantry support and as a mounted weapon on vehicles and aircraft.
-
E.
M60 machine gun
The M60 machine gun is a 7.62×51mm NATO general-purpose machine gun developed by the United States and widely used by its military forces from the late 1950s onward.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
autocannon
ⓘ
chain gun ⓘ |
| allianceStandard | NATO ⓘ |
| ammunitionType | 25×137 mm NATO ⓘ |
| barrelLength | approximately 2.175 m ⓘ |
| caliber | 25 mm ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| crewServed | yes ⓘ |
| cyclicRateOfFire | up to 200 rounds per minute ⓘ |
| designedFor |
armored fighting vehicles
ⓘ
naval mounts ⓘ |
| enteredService | early 1980s ⓘ |
| feedSystem | dual-feed ⓘ |
| manufacturer |
Alliant Techsystems
ⓘ
Northrop Grumman ⓘ |
| mountType |
remote weapon station
ⓘ
turret-mounted ⓘ |
| notableFeature |
externally powered chain drive reduces jams
ⓘ
high reliability ⓘ selectable dual-feed ammunition ⓘ |
| operation | externally powered ⓘ |
| powerSource | electric motor ⓘ |
| primaryRole | anti-armor ⓘ |
| rateOfFire |
high rate
ⓘ
low rate ⓘ single-shot ⓘ |
| secondaryRole |
anti-aircraft (limited)
ⓘ
anti-personnel ⓘ |
| standardAmmunition |
APDS-T
ⓘ
HEI-T ⓘ TP-T ⓘ |
| successor |
M242 Bushmaster 25 mm chain gun
self-linksurface differs
ⓘ
surface form:
Bushmaster II 30 mm chain gun
M242 Bushmaster 25 mm chain gun self-linksurface differs ⓘ
surface form:
Bushmaster III 35/50 mm chain gun
|
| usedBy |
Canadian Army
ⓘ
Australian Army ⓘ
surface form:
Royal Australian Army
United States Army ⓘ United States Marine Corps ⓘ numerous NATO member states ⓘ |
| usedOnPlatform |
ASLAV armoured vehicle
ⓘ
surface form:
ASLAV armored vehicle
Light Armored Vehicle-25 ⓘ
surface form:
LAV-25 armored vehicle
M1126 Stryker ICV variants ⓘ M1134 Anti-Tank Guided Missile Vehicle ⓘ M2 Bradley infantry fighting vehicle ⓘ M3 Bradley Cavalry Fighting Vehicle (historical) ⓘ
surface form:
M3 Bradley cavalry fighting vehicle
Royal Navy Type 23 frigate ⓘ various naval remote weapon stations ⓘ |
| weaponAction | chain-driven ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: M242 Bushmaster 25 mm chain gun Description of subject: The M242 Bushmaster 25 mm chain gun is a widely used, externally powered autocannon known for its reliability and versatility on armored vehicles and naval platforms.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
M242 Bushmaster 25 mm chain gun
→
successor
→
M242 Bushmaster 25 mm chain gun
self-linksurface differs
ⓘ
subject surface form:
M242 Bushmaster
this entity surface form:
Bushmaster II 30 mm chain gun
M242 Bushmaster 25 mm chain gun
→
successor
→
M242 Bushmaster 25 mm chain gun
self-linksurface differs
ⓘ
subject surface form:
M242 Bushmaster
this entity surface form:
Bushmaster III 35/50 mm chain gun
subject surface form:
ASLAV
this entity surface form:
25 mm M242 Bushmaster chain gun