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5.56×45mm NATO: History, Art & Standards

The 5.56×45mm NATO (official NATO nomenclature 5.56 NATO, commonly pronounced "five-five-six") is a rimless bottlenecked centerfire intermediate cartridge family developed in the late 1970s in Belgium by FN Herstal. It consists of the SS109, L110, and SS111 cartridges. On 28 October 1980, under STANAG 4172, it was standardized as the second standard…

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5.56×45mm NATO topic overview

The analysis highlights History, Art and Standards as prominent areas in the source structure around 5.56×45mm NATO. 1 topic appears in more than one source area, which can help identify connections that are less obvious in a linear reading.

Related topics
153
Source areas
8
Connected nodes
162
Extracted relationships
125
Concept neighborhoods
41
Bridge connections
162

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Military cartridges · 48 topics
Overview · 32 topics
Performance · 27 topics
History · 25 topics
Cartridge dimensions · 9 topics
5.56mm NATO versus .223 Remington · 7 topics
Ammunition capacity for weight comparison · 5 topics
Rifle barrel configurations · 1 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Base diameter
9.58 mm (0.377 in)
Bullet diameter
5.70 mm (0.224 in)
Bullet mass/type
Bullet mass/type Velocity Energy 3.56 g (55 gr) XM193 FMJBT 993 m/s (3,260 ft/s) 1,755 J (1,294 ft⋅lbf) 4 g (62 gr) SS109 FMJBT 948 m/s (3,110 ft/s) 1,797 J (1,325 ft⋅lbf) 4 g (…
Case capacity
1.85 cm3 (28.5 gr H2O)
Case length
44.70 mm (1.760 in)
Case type
Rimless tapered, bottleneck

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

History

Cartridge dimensions

Rifle barrel configurations

Performance

5.56mm NATO versus .223 Remington

Ammunition capacity for weight comparison

Military cartridges

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How 5.56×45mm NATO connects Entity context

The extracted context around 5.56×45mm NATO shows recurring relationship patterns in the source. For example, 5.56×45mm NATO → Cart, Cartouche, Cartuccia, FMJ, French, Fucile, Fusil, Gewehr Patrone, Gw Pat, In, Italian, Italian-speaking Swiss, NATO, Previous, Remington, Rifle Cartridge, SIG SG, Swiss, The, The Gw Pat Another extracted example is 5.56×45mm NATO → Black Hill Ammunition, Bryce Towsley, Chamber, Early, It, Jeff Hoffman, MPa, NATO, NATO AEP-97/AOP-4172, NATO EPVAT, NATO Reference Ammunition, On, Rem, SAAMI, SCATP, The, The CIP, The SAAMI, The US. Use these groups to spot repeated connection types before inspecting the individual relationships.

5.56×45mm NATO

Top relations

related to 5.6mm Gewehr Patrone 90 · 21
5.56×45mm NATO → Cart, Cartouche, Cartuccia, FMJ, French, Fucile, Fusil, Gewehr Patrone, Gw Pat, In, Italian, Italian-speaking Swiss, NATO, Previous, Remington, Rifle Cartridge, SIG SG, Swiss, The, The Gw Pat
related to Pressure · 19
5.56×45mm NATO → Black Hill Ammunition, Bryce Towsley, Chamber, Early, It, Jeff Hoffman, MPa, NATO, NATO AEP-97/AOP-4172, NATO EPVAT, NATO Reference Ammunition, On, Rem, SAAMI, SCATP, The, The CIP, The SAAMI, The US
related to Chamber · 14
5.56×45mm NATO → Although, ArmaLite, Firing, NATO, NATO-chambered, Remington, Remington-chambered, Rock River Arms, SAAMI, Still, The, To, Using, Wylde
related to Criticism · 13
5.56×45mm NATO → Arguably, In, M16, M193, M4, M855/SS109, M855A1 EPR, Martin Fackler, NATO, Some, STANAG, The, There
related to Rifle barrel configurations · 13
5.56×45mm NATO → AR-type, In, NATO, NATO L110/M856, Noveske, Remington, Some, The US, These, Those, US, When, Wylde
related to Performance · 10
5.56×45mm NATO → As, Fragmentation, However, M855, NATO, NATO SS109/M855, SS109, The, These, This
related to Cartridge dimensions · 3
5.56×45mm NATO → H2O, NATO, The
see also · 3
5.56×45mm NATO → ARCExpress, List, NATO
Base diameter · 1
5.56×45mm NATO → 9.58 mm (0.377 in)
Bullet diameter · 1
5.56×45mm NATO → 5.70 mm (0.224 in)

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

56 cartridge nato 45mm round mm ammunition m855 rifle bullet ss109 m855a1 ball 223 rounds tip produced performance remington barrel

5.56×45mm NATO relationships Subject–Predicate–Object triples

TTTA extracted 125 structured relationships around 5.56×45mm NATO. Examples in this analysis include 5.56×45mm NATO → Base diameter → 9.58 mm (0.377 in) and 5.56×45mm NATO → Bullet diameter → 5.70 mm (0.224 in). The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
5.56×45mm NATOBase diameter9.58 mm (0.377 in)1.00infobox
5.56×45mm NATOBullet diameter5.70 mm (0.224 in)1.00infobox
5.56×45mm NATOBullet mass/typeBullet mass/type Velocity Energy 3.56 g (55 gr) XM193 FMJBT 993 m/s (3,260 ft/s) 1,755 J (1,294 ft⋅lbf) 4 g (62 gr) SS109 FMJBT 948 m/s (3,110 ft/s) 1,797 J (1,325 ft⋅lbf) 4 g (…1.00infobox
5.56×45mm NATOCase capacity1.85 cm3 (28.5 gr H2O)1.00infobox
5.56×45mm NATOCase length44.70 mm (1.760 in)1.00infobox
5.56×45mm NATOCase typeRimless tapered, bottleneck1.00infobox
5.56×45mm NATODesignedlate 1970s–19801.00infobox
5.56×45mm NATODesignerFN Herstal1.00infobox
5.56×45mm NATOIn service1980–present1.00infobox
5.56×45mm NATOLand diameter5.56 mm (0.219 in)1.00infobox
5.56×45mm NATOMaximum pressure (EPVAT)430.00 MPa (62,366 psi)1.00infobox
5.56×45mm NATOMaximum pressure (SCATP 5.56)380.00 MPa (55,114 psi)1.00infobox
5.56×45mm NATONeck diameter6.43 mm (0.253 in)1.00infobox
5.56×45mm NATOOverall length57.40 mm (2.260 in)1.00infobox
5.56×45mm NATOParent case.223 Remington (M193)1.00infobox
5.56×45mm NATOPlace of originBelgium1.00infobox
5.56×45mm NATOPrimer typeSmall rifle1.00infobox
5.56×45mm NATORifling twist1 in 7 in (178 mm) or 1 in 9 in (229 mm)1.00infobox
5.56×45mm NATORim diameter9.60 mm (0.378 in)1.00infobox
5.56×45mm NATORim thickness1.14 mm (0.045 in)1.00infobox
5.56×45mm NATOShoulder diameter9.00 mm (0.354 in)1.00infobox
5.56×45mm NATOTypeRifle, carbine, DMR, and LMG1.00infobox
5.56×45mm NATOUsed byNATO, Japan, South Korea, Taiwan, Australia, Israel, other major non-NATO allies1.00infobox

Related concept clusters Concept neighborhoods

The concept neighborhoods around 5.56×45mm NATO bring nearby vocabulary together. In this analysis, examples include Cartridge, Nato and Mm. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • 5.56×45mm NATO
    • Cartridge
    • Nato
    • Mm
    • Caliber
    • Produced
    • Ball
    • Tip
    • Tracer
    • Designed
    • Remington
    • Round
    • Ss109
  • 5.56×45mm nato
    • Cartridge
    • Nato
    • Mm
    • Caliber
    • Produced
    • Pressure
    • Ball
    • Remington
    • Tip
    • Standard
    • Ammunition
    • Tracer
  • nato
    • Pressure
    • Remington
    • Standard
    • Mm
    • Ammunition
    • Designed
    • Chamber
    • Rifle
    • 56mm
    • Ss109
    • Round
    • Rifles
  • intermediate cartridge
    • Mm
    • Caliber
    • Tip
    • Ball
    • Produced
    • Nato
    • Rifle
    • Case
    • Ss109
    • Remington
    • Round
    • 56mm
  • fn herstal
    • Ss109
    • Ball
    • 56mm
    • Produced
    • Tracer
    • Round
    • Used
    • Caliber
    • M855
    • Performance
    • Case
    • Tip
  • .223 remington
    • Rifle
    • 56mm
    • Rifles
    • Pressure
    • Ammunition
    • Also
    • Rounds
    • Mm
    • Fired
    • Use
    • Barrel
    • Used
  • remington arms
    • Rifle
    • 56mm
    • Rifles
    • Pressure
    • Ammunition
    • Also
    • Rounds
    • Mm
    • Fired
    • Use
    • Barrel
    • Used
  • .222 caliber
    • Mm
    • Cartridge
    • Ball
    • Tip
    • Tracer
    • Case
    • Use
    • Rifle
    • Steel
    • Fn
    • Lead
    • Training

Connections between topic areas Semantic bridges

For 5.56×45mm NATO, one of the stronger structural bridges in this analysis connects 5.56×45mm NATO with Military cartridges. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
5.56×45mm NATO — Military cartridges · splits 114 ⟂ 49
5.56×45mm NATO — Overview · splits 130 ⟂ 33
5.56×45mm NATO — Performance · splits 135 ⟂ 28
5.56×45mm NATO — History · splits 137 ⟂ 26
5.56×45mm NATO — Cartridge dimensions · splits 153 ⟂ 10
5.56×45mm NATO — 5.56mm NATO versus .223 Remington · splits 155 ⟂ 8
5.56×45mm NATO — Ammunition capacity for weight comparison · splits 157 ⟂ 6

Map overview Semantic statistics

5.56×45mm NATO

Nodes163
Edges162
Triples125
Avg. degree1.99
Density0.01227
Components1

Source & methodology

TTTA analyzes the structure around 5.56×45mm NATO to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as History, Art & Standards, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — 5.56×45mm NATO · EN edition · Analysis: TopicsToTalkAbout

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