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5.56×45mm NATO
 
5.56×45mm NATO with measurement, left to right: bullet, empty case, complete round with bullet in casing
TypeRifle
Place of origin  United States
Service history
In serviceSince 1963
Used byNATO
WarsSince Vietnam War
Production history
DesignerRemington Arms
Specifications
Parent case.223 Remington
Case typeRimless, bottleneck
Bullet diameter5.70 mm (0.224 in)
Neck diameter6.43 mm (0.253 in)
Shoulder diameter9.00 mm (0.354 in)
Base diameter9.58 mm (0.377 in)
Rim diameter9.60 mm (0.378 in)
Rim thickness1.14 mm (0.045 in)
Case length44.70 mm (1.760 in)
Overall length57.40 mm (2.260 in)
Case capacity1.85 cm3 (28.5 gr H2O)
Rifling twist178 mm or 229 mm (1 in 7 in or 9 in, originally 1 in 14 in)
Primer typeSmall rifle
Maximum pressure (EPVAT)430.00 MPa (62,366 psi)
Maximum pressure (SCATP 5.56)380.00 MPa (55,114 psi)
Ballistic performance
Bullet mass/type Velocity Energy
4 g (62 gr) SS109 FMJBT 940 m/s (3,100 ft/s) 1,767 J (1,303 ft⋅lbf)
4.1 g (63 gr) DM11 FMJBT 936 m/s (3,070 ft/s) 1,796 J (1,325 ft⋅lbf)
4.1 g (63 gr) GP 90 FMJBT 905 m/s (2,970 ft/s) 1,679 J (1,238 ft⋅lbf)
Test barrel length: 508 mm (20.0 in)
Source(s): NATO EPVAT testing, QuickLOAD, SAAMI, C.I.P.[1][2]


5.56×45mm NATO
 
5.56×45mm NATO with measurement, left to right: bullet, empty case, complete round with bullet in casing
TypeRifle
Place of origin  United States
Service history
In serviceSince 1963
Used byNATO
WarsSince Vietnam War
Production history
DesignerRemington Arms
Specifications
Parent case.223 Remington
Case typeRimless, bottleneck
Bullet diameter5.70 mm (0.224 in)
Neck diameter6.43 mm (0.253 in)
Shoulder diameter9.00 mm (0.354 in)
Base diameter9.58 mm (0.377 in)
Rim diameter9.60 mm (0.378 in)
Rim thickness1.14 mm (0.045 in)
Case length44.70 mm (1.760 in)
Overall length57.40 mm (2.260 in)
Case capacity1.85 cm3 (28.5 gr H2O)
Rifling twist178 mm or 229 mm (1 in 7 in or 9 in, originally 1 in 14 in)
Primer typeSmall rifle
Maximum pressure430.00 MPa (62,366 psi)
Ballistic performance
Bullet mass/type Velocity Energy
4 g (62 gr) SS109 FMJBT 940 m/s (3,100 ft/s) 1,767 J (1,303 ft⋅lbf)
4.1 g (63 gr) DM11 FMJBT 936 m/s (3,070 ft/s) 1,796 J (1,325 ft⋅lbf)
4.1 g (63 gr) GP 90 FMJBT 905 m/s (2,970 ft/s) 1,679 J (1,238 ft⋅lbf)
Test barrel length: 508 mm (20.0 in)
Source(s): NATO EPVAT testing, QuickLOAD, SAAMI, C.I.P.[3][4]


5.56×45mm NATO
 
5.56×45mm NATO with measurement, left to right: bullet, empty case, complete round with bullet in casing
TypeRifle
Place of origin  United States
Service history
In serviceSince 1963
Used byNATO
WarsSince Vietnam War
Production history
DesignerRemington Arms
Specifications
Parent case.223 Remington
Case typeRimless, bottleneck
Bullet diameter5.70 mm (0.224 in)
Neck diameter6.43 mm (0.253 in)
Shoulder diameter9.00 mm (0.354 in)
Base diameter9.58 mm (0.377 in)
Rim diameter9.60 mm (0.378 in)
Rim thickness1.14 mm (0.045 in)
Case length44.70 mm (1.760 in)
Overall length57.40 mm (2.260 in)
Case capacity1.85 cm3 (28.5 gr H2O)
Rifling twist178 mm or 229 mm (1 in 7 in or 9 in, originally 1 in 14 in)
Primer typeSmall rifle
Maximum pressure (EPVAT)430.00 MPa (62,366 psi)
Ballistic performance
Bullet mass/type Velocity Energy
4 g (62 gr) SS109 FMJBT 940 m/s (3,100 ft/s) 1,767 J (1,303 ft⋅lbf)
4.1 g (63 gr) DM11 FMJBT 936 m/s (3,070 ft/s) 1,796 J (1,325 ft⋅lbf)
4.1 g (63 gr) GP 90 FMJBT 905 m/s (2,970 ft/s) 1,679 J (1,238 ft⋅lbf)
Test barrel length: 508 mm (20.0 in)
Source(s): NATO EPVAT testing, QuickLOAD, SAAMI, C.I.P.[5][6]


  1. ^ "C.I.P. decisions, texts and tables – free current C.I.P. CD-ROM version download (ZIP and RAR format)". Archived from the original on 29 September 2008. Retrieved 2008-10-17.
  2. ^ US Mil-spec MIL-C-9963F
  3. ^ "C.I.P. decisions, texts and tables – free current C.I.P. CD-ROM version download (ZIP and RAR format)". Archived from the original on 29 September 2008. Retrieved 2008-10-17.
  4. ^ US Mil-spec MIL-C-9963F
  5. ^ "C.I.P. decisions, texts and tables – free current C.I.P. CD-ROM version download (ZIP and RAR format)". Archived from the original on 29 September 2008. Retrieved 2008-10-17.
  6. ^ US Mil-spec MIL-C-9963F
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