HK21
E713974
The HK21 is a German belt-fed general-purpose machine gun developed by Heckler & Koch, known for its modular design and use of the roller-delayed blowback system.
All labels observed (3)
How this entity was disambiguated
This entity first appeared as the object of triple T8131462 — 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: HK21 Context triple: [HK G3 series, influenced, HK21]
-
A.
HK2388
HK2388 is the Hong Kong–listed stock of Bank of China (Hong Kong), a major commercial banking group in Hong Kong.
-
B.
HCKE
HCKE is the official abbreviation for HC Košice, a professional ice hockey club based in Košice, Slovakia.
-
C.
HIN
HIN is the National Rail station code for Hindley railway station in Greater Manchester, England.
-
D.
HKY
HKY is the three-letter IATA airport code for Hickory Regional Airport in Hickory, North Carolina, USA.
-
E.
HKNW
HKNW is the ICAO airport code assigned to Wilson Airport in Nairobi, Kenya.
- 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: HK21 Target entity description: The HK21 is a German belt-fed general-purpose machine gun developed by Heckler & Koch, known for its modular design and use of the roller-delayed blowback system.
-
A.
HK2388
HK2388 is the Hong Kong–listed stock of Bank of China (Hong Kong), a major commercial banking group in Hong Kong.
-
B.
HCKE
HCKE is the official abbreviation for HC Košice, a professional ice hockey club based in Košice, Slovakia.
-
C.
HIN
HIN is the National Rail station code for Hindley railway station in Greater Manchester, England.
-
D.
HKY
HKY is the three-letter IATA airport code for Hickory Regional Airport in Hickory, North Carolina, USA.
-
E.
HKNW
HKNW is the ICAO airport code assigned to Wilson Airport in Nairobi, Kenya.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf | general-purpose machine gun ⓘ |
| action | roller-delayed blowback ⓘ |
| basedOn | Heckler & Koch G3 rifle NERFINISHED ⓘ |
| canBeConfiguredAs |
light machine gun
ⓘ
medium machine gun ⓘ |
| canUse |
box magazines (in some configurations)
ⓘ
disintegrating metal link belts ⓘ non-disintegrating belts ⓘ |
| cartridge | 7.62×51mm NATO ⓘ |
| category |
7.62×51mm NATO machine guns
ⓘ
Heckler & Koch machine guns NERFINISHED ⓘ general-purpose machine guns ⓘ |
| chamberingOptions |
5.56×45mm NATO (HK23 variants)
ⓘ
7.62×51mm NATO NERFINISHED ⓘ |
| countryOfOrigin |
Germany
ⓘ
West Germany NERFINISHED ⓘ |
| designedBy | Heckler & Koch engineers NERFINISHED ⓘ |
| designedFor | general-purpose machine gun role ⓘ |
| feedSystem | belt-fed ⓘ |
| firingMode |
fully automatic
ⓘ
selective fire ⓘ |
| hasFeature |
modular feed mechanism
ⓘ
quick-change barrel ⓘ roller-locked bolt head ⓘ |
| hasVariant |
HK21A1
ⓘ
HK21E NERFINISHED ⓘ HK23 ⓘ HK23E ⓘ |
| inService | 1960s ⓘ |
| intendedUsers |
military forces
ⓘ
paramilitary forces ⓘ |
| introduced | 1960s ⓘ |
| isModular | true ⓘ |
| manufacturer | Heckler & Koch NERFINISHED ⓘ |
| mountsOn |
bipod
ⓘ
tripod ⓘ |
| typicalRateOfFire | about 800 rounds per minute ⓘ |
| usedBy |
Brazil
NERFINISHED
ⓘ
Chile NERFINISHED ⓘ Greece NERFINISHED ⓘ Mexico NERFINISHED ⓘ Portugal NERFINISHED ⓘ Turkey NERFINISHED ⓘ |
| usedIn | various NATO-aligned countries ⓘ |
| usesOperatingSystemDerivedFrom | G3 rifle NERFINISHED ⓘ |
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: HK21 Description of subject: The HK21 is a German belt-fed general-purpose machine gun developed by Heckler & Koch, known for its modular design and use of the roller-delayed blowback system.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.