Battlefront is featuring the M51 Isherman in their latest article for Flames of War.
From the article:
First shown publicly in 1965, the M51 Isherman (a name used by the crews from a contraction of ‘Israeli Sherman’) was an even more radical adaptation of the venerable Sherman design. Based on the 76mm-armed M1 chassis, the M51 was armed with a modified French 105mm gun from the latest AMX-30 main battle tank. The gun itself had been shortened and a huge muzzle brake was added to handle its recoil.