I would just like to let you know that I host Locked Free-For-All Lobbies that allow 4+ users to boost in practically any way.. For instance I got the 1000 kills with AC-130 emblem in about 2 hours. (Spinning Cross)
Also ive gotten about 6000 headshots in like 2 days. and as for challenges you can complete them, such as... shooting an enemy explosive and killing him through a wall.. Soooo ya, if your interested I host these locked lobbies from:
5-8pm EST Mon-Fri
Sat-Sun - Closed
Thanks, Shoot me a message or add me on Ps3 if interested!
Have a great day!