Reply #7: I believe you are speaking of a tandem grenade

[RapidCreek]

The PG-7VR is a tandem warhead designed to penetrate explosive reactive armor and the armor underneath. I think this is the one that they're using on the Abrams. They're any number of warheads which may be used with the RPG-7 type launcher.

Im not sure who manufactures the PG-7VR now but they were developed about 15 years ago in Russia.

I can't say I'm hip to the whole RPG ordinance deal but the guys at this link are discussing that which interests you...and they most certainly seem to be hip http://www.gunboards.com/forums/topic.asp?TOPIC_ID=9977

You may also find this of interest
http://www.armytimes.com/channel.php?GQID=292236 click the Punching through the Abrams armor – slide show link EDITED FOR CORRECT LINK
RC