I just figured you stg lovers would appreciate this
http://img228.imageshack.us/img228/933/ohyeahjx0.jpg

Is...that the grenade pistol underneath the barrel?

Not too sure... Is that some sort of Czech or Argentinian lmg style of support weapon?!?

Where the hell did you find that?

Actually these are post-war modifications - I seriously doubt these modifications were made during the war (the STG on the right looks like a RPK)

After further research, these modifications (don't know anything about the one on the left) but the one of the right was seen issued in limited number to Volkspolizei (the predecessor of the Nationale Volksarmee of the Deutsch Demokratic Republic). Other modifications such as version with a folding stock was also produced in spain right after WW2 before another more modern design was introduced to replace it.

http://i10.photobucket.com/albums/a1...44varients.jpg

Many others post-war variants also exists but they were generally rare and most of them never saw action as newer more modern design replaced them quickly.