Me and my buddies have played DayZ quite a bit. Right now on BMRF Private Hive, I have an M4A1 CCO. We actually had quite and adventure on that server. I spawned in Balota, and right off the bat had an M16A2. We travelled all the way to the gas station in the south east part of the island, me and my two friends (I was the best armed). We found a person who was talking in direct with a crossbow, held him up for a few seconds, then my friend told me to shoot him, so I did. We found his friend just down the road, whom my other friend shot.
We then travelled north to Solnichniy, where we met up and talked to a passer-by. I had a pretty close call myself, thank god I had my volume up. My friends were looting the town when I though I head something. I tried not to act alarmed, but I looked behind me and saw a guy with a hatchet maybe 20 meters up the hill trying to sneak up on me. I stood up and ran as fast as I could, but I didn't shoot him because he appeared to be a fairly new spawn.
We carried on North though Berezino, picked up a car and drove all the way to a hill to the north of Guba, where we set up camp. While everyone else was scouting (we now had 4 people in our party), it was only me and one other guy defending the camp. A little bird flew over the camp, then came back around and dropped a guy with a DMR. I ran back to one of the tents with the M4A1 CCO in it and returned just as the guy landed and began shooting at my friend. I double tapped him and killed him, and my friend couldn't believe me and him survived (the raider was shooting rapidly at him, clearly desperate for a kill and unaware that I was there).
We then drove all the way across the map to Vybor, where our Skoda took a few shots. We lost a wheel, and another shot almost killed our friend in the back seat. We grabbed our loot from it as quickly as possible while I returned fire (I only knew which bush he was near). Then we ran north and set up camp in a location which I won't disclose until we move again.