The XM360 - 120mm Round at 4200FPS - Range: 7.5 Miles

Is this the ultimate new tech for tank mounted assault?
Army tests new mounted gun

Snippet:
A large ball of fire burst from a 120mm barrel as the Army’s XM360 tank gun sent rounds at 1,300 meters per second through a mesh target 1 kilometer away at Aberdeen Proving Ground, Md. The March 14 test was part of the Army’s evaluation of the first six of the guns.

“The 120mm gun you are seeing here is the most advanced and the lightest in the world,” said Dave Smith, a design team leader with the Army’s Benét Laboratories in Watervliet, N.Y.

Below is a PDF file with Smith's (DAVID C. SMITH, P.E.) Test Results

NDIA Test Results
www.dtic.mil...

This has a range of over 7.5 Miles. and is 1/3 lighter than Abrams Tank Cannon.

All I can say is when deployed, the only warning label should say,
"Go Ahead...Make My Day"