The U.S. Army Is Building a New Lightweight .50-Cal Machine Gun

Military Weapons: The M2 Browning .50-cal - Warfare History Network

The Buzz, Page 3234

Here's one of the big guns competing to be SOCOM's next

XM806 - Wikipedia

XM806 Archives -The Firearm Blog

M 2 50 caliber machine gun hi-res stock photography and images - Alamy

Hands-On With the Army's New M7 Rifle and M250 Machine Gun

What are the Fastest Firing Guns?

Military Systems Group, Inc., Machine Gun Turret Mounts