We sat there for awhile staring silently at Mosul, when all the sudden we heard, kinda off to the distance, to about to our 7 o'clock, two cracks of gunfire. The bullets kinda skimmed close to where all of us we're at, and hit this old ancient looking building that was about 200 meters away from us. We heard the bullets impact the building and make a ricochet noise.
Sounds like some jihadist popped off a couple rounds from an AK or SKS. If the sounds were heard before the bullets, I think the shooter must have been closer than the 500 meters estimated by the author.