12.7x99mm NATO
12.7mm NATO · 1921 · John Moses Browning · 6 firearms in catalog
Also known as: .50 BMG, .50 Browning, 12.7x99mm, .50 Caliber
Cartridge specifications
| Bullet Diameter | 12.95 mm (0.510") |
| Neck Diameter | 14.22 mm (0.560") |
| Base Diameter | 20.42 mm (0.804") |
| Case Length | 99 mm (3.898") |
| Overall Length | 138 mm (5.433") |
| Max Pressure | 380 MPa (54,800 psi) |
| Typical Bullet Weight | 41.9 g (647 gr) |
| Typical Muzzle Velocity | 884 m/s (2900 fps) |
| Typical Muzzle Energy | 16370 J (12074 ft·lbf) |
| Primer Type | Large Rifle |
| Cartridge Type | Rimless |
| Introduced | 1921 |
Firearms chambered in 12.7x99mm NATO
- Browning M2HB — Browning Arms Company · Machine Gun · 1933
- CIS 50MG — ST Kinetics · Machine Gun · 1991
- Daewoo K6 — S&T Motiv (formerly Daewoo Precision Industries) · Machine Gun · 1990
- GAU-19/A — General Dynamics Ordnance and Tactical Systems · Machine Gun · 1983
- M85 Machine Gun — AAI Corporation · Machine Gun · 1959
- Steyr HS .50 — Steyr Mannlicher GmbH · Sniper Rifle · 2004