East Germany had a 5.45x39 sniper rifle. Apparentely not very good but they did exist. They were sold as surplus in the USA in the mid-90's.5.45mm won't make much of a sniper rifle round
http://www.shelfspace.com/~c-r-ffl/archives/199603/msg00037.html
Short article explains former designation and use (anti-terror units of the
MfS in airport service), some technical details (rear-locking turnbolt
action with four lugs, hammer-forged barrel), trigger is known for
breaking off easily in service (as a former GDR sniper told the author);
group sizes at 100 metres (bench-rested, 4x32 factory-installed scope):
12 cms with Russian military ammo, 7,5 and 4 cms with GDR issue ammo of
Koenigswartha manufacture (mercury fulminate primers, as usual with GDR
small arms cartridges).