M2HB
E432315
The M2HB is a heavy-barrel variant of the Browning .50 caliber machine gun, widely used for its durability and sustained fire capability in ground, vehicle, and naval mounts.
All labels observed (1)
| Label | Occurrences |
|---|---|
| M2HB canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4323009 — 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: M2HB Context triple: [.50 caliber M2 Browning machine gun, notableVariant, M2HB]
-
A.
M2
M2 is a major British motorway that connects London with the port town of Dover in Kent, serving as an important route to the Channel ports.
-
B.
M2
M2 is the second line of the Warsaw Metro, running east–west across the city and connecting key districts on both sides of the Vistula River.
-
C.
M2
M2 is one of the main lines of the Copenhagen Metro, connecting central Copenhagen with key districts and the airport.
-
D.
M2
M2 is a boat line that operates as part of Geneva’s public transport network, providing passenger services across the city’s waters.
-
E.
M2
M2 was the original name of MTV2, a U.S. cable television channel that focused on music videos and youth-oriented programming.
- 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: M2HB Target entity description: The M2HB is a heavy-barrel variant of the Browning .50 caliber machine gun, widely used for its durability and sustained fire capability in ground, vehicle, and naval mounts.
-
A.
M2
M2 is a major British motorway that connects London with the port town of Dover in Kent, serving as an important route to the Channel ports.
-
B.
M2
M2 is the second line of the Warsaw Metro, running east–west across the city and connecting key districts on both sides of the Vistula River.
-
C.
M2
M2 is one of the main lines of the Copenhagen Metro, connecting central Copenhagen with key districts and the airport.
-
D.
M2
M2 was the original name of MTV2, a U.S. cable television channel that focused on music videos and youth-oriented programming.
-
E.
M2
M2 is a metro line in Lausanne, Switzerland, forming part of the city's urban rapid transit network.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
.50 caliber machine gun
ⓘ
Browning M2 variant ⓘ heavy machine gun ⓘ |
| action |
closed bolt
ⓘ
short recoil operated ⓘ |
| barrelType | heavy barrel ⓘ |
| beltType | disintegrating metallic link belt ⓘ |
| caliber | 12.7×99mm NATO ⓘ |
| cartridge | .50 BMG ⓘ |
| conflict |
Gulf War
ⓘ
Iraq War ⓘ Korean War ⓘ Vietnam War ⓘ War in Afghanistan (2001–2021) ⓘ World War II ⓘ |
| coolingSystem | air-cooled ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| designer | John Browning NERFINISHED ⓘ |
| effectiveRange | approximately 1,800 meters ⓘ |
| feedSystem | belt-fed ⓘ |
| introduced | 1930s ⓘ |
| maximumRange | over 6,000 meters ⓘ |
| mountType |
naval pedestal mount
ⓘ
ring mount ⓘ tripod mount ⓘ vehicle pintle mount ⓘ |
| muzzleVelocity | approximately 890 m/s ⓘ |
| notableFeature |
heavy barrel for heat resistance
ⓘ
high durability ⓘ long service life ⓘ sustained fire capability ⓘ |
| partOfSeries | Browning M2 machine gun family NERFINISHED ⓘ |
| rateOfFire | approximately 450–600 rounds per minute ⓘ |
| role |
anti-aircraft weapon
ⓘ
infantry support weapon ⓘ naval weapon ⓘ vehicle-mounted weapon ⓘ |
| standardCaliber | .50 caliber ⓘ |
| usedAs |
coaxial or flexible aircraft gun in some configurations
ⓘ
door gun on helicopters ⓘ primary armament on many armored vehicles ⓘ secondary armament on tanks ⓘ |
| usedBy |
NATO member states
ⓘ
United States Air Force ⓘ United States Army ⓘ United States Marine Corps ⓘ United States Navy ⓘ many other countries worldwide ⓘ |
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: M2HB Description of subject: The M2HB is a heavy-barrel variant of the Browning .50 caliber machine gun, widely used for its durability and sustained fire capability in ground, vehicle, and naval mounts.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
.50 caliber M2 Browning machine gun