5.56x45mm Duplex
1988 · Olin/Winchester · 1 firearm in catalog
Also known as: 5.56mm Duplex, 5.56x45mm twin-bullet
Cartridge specifications
| Bullet Diameter | 5.69 mm (0.224") |
| Neck Diameter | 6.43 mm (0.253") |
| Base Diameter | 9.6 mm (0.378") |
| Case Length | 44.7 mm (1.760") |
| Overall Length | 57.4 mm (2.260") |
| Max Pressure | 430 MPa (62,366 psi) |
| Typical Bullet Weight | 4.4 g (68 gr) |
| Typical Muzzle Velocity | 850 m/s (2789 fps) |
| Typical Muzzle Energy | 1300 J (959 ft·lbf) |
| Primer Type | Small Rifle |
| Cartridge Type | Rimless Bottleneck |
| Introduced | 1988 |
Firearms chambered in 5.56x45mm Duplex
- Colt ACR — Colt's Manufacturing Company · Assault Rifle · 1989
Cartridge family
Parent cartridge: 5.56x45mm NATO