I have seen photos of guns on Google Street Maps before, usually of men outside gun shops, but never any as close up as this photo which was captured by maps.Yandex.ru, a Russian equivalent to Google Street Maps.
The images seem to have been taken outside a gun or hunting club. The rifle pictured above appears to be a wooden stocked 7.62x39mm Saiga with a five round magazine. English Russia has more photos.
[Hat Tip: Whale Oil ]