Yeah... I was out preforming USMC marksmen with the MEC rifleman kit today on Al Kufrah. The G3 is wicked, all I did was went up into a drilling tower by oil depot, threw down an ammo bag, and sniped. Went 18-1, the one being when I came out of the tower to give ammo I got TK'd by a jumpy individual in a Voldnik gunner position.
Still, I was spotted a few times and m16 fire would ping around me, but I just kept cool and in 1 or 2 shots in semi-auto I could take them down. I think I got hit once and a bandage took care of that. For a weapon known for being accurate, they sure couldn't hit me!

The M14 gave me a scare though, but he missed and I didn't (I must of landed a headshot or he was wound 'cause it only took 1 shot.)
G3 > All other standard rifles.