HK 51 Technical Specifications

Caliber	7.62x51mm (.308 Win)
Ammunition Feed	Staggered magazines; 5- or 20-round capacity
Cyclic rate	600 RPM
Sight Radius	15.4 inches
Weight: with empty magazine	6.85 pounds
Barrel length	8.31 inches
Overall length	23.17/30.72 inches
Width	2.28 inches (57.91mm)
Height	8.26 inches (209.8mm)

Information courtesy of Heckler and Koch