Research any topic before you write.

Find related topics. | Discover entities. | See connections. | Build a topical map.

5.56×45mm NATO

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…

History, Art & Standards

Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.

Research this topic

Explore the main themes, entities and connections around 5.56×45mm NATO. Start with the topic map, then use the sections below for research and deeper semantic analysis.

Explore this topic

Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.

History

Service rifle.280FNFN FALRecoil
25 related topics

Performance

SpitzerYawFragmentCannelureBarrel
27 related topics

Military cartridges

BandoliersCharger clipsLinkedMeplatF88
48 related topics

Overview

NATORimlessCenterfireIntermediate cartridgeFN Herstal
32 related topics

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

Topics to explore

Browse the full topic structure. 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.

Map overview Semantic statistics

5.56×45mm NATO

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

How this topic connects Entity context

See the strongest relationship patterns around the current topic before diving into the raw triples.

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 Word statistics

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

Entity relationships Subject–Predicate–Object triples

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

These clusters group vocabulary that occurs around closely connected concepts in the source material.

    Connections between topic areas Semantic bridges

    Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.

    Min side: 3
    For writers, content strategists, SEOs, marketers and creators — from quick topic research to advanced semantic analysis.