1] You need to be level 65 [to have the "First Class" Challenges unlocked]
2] You need a grenade launcher
3] Portable Radar will help but not essential
4] Claymores are the best to use
Simply camp in a popular spot on any map then place a claymore [So the red lasers are pointing to you] this stops the enemy setting the claymore off. Then place portable radar down if you have them and simply blow your own claymore up when an enemy appears.
Bingo you have completed the "Dominos" Challenge and have the leaf
That sounds good man, it took ages at first but I was only going around looking for campers sat near bettys, dont do that its epic fail. When I tried what I did in the video it took 3 attempts all those attempts I was too close to the betty so you will need to think like the camper and be very acurate at aiming at your claymore
seriously u think u can delete my comments and i will just give up think again an answer is all i want and i do not want to come through for it but i will. but hey read the username and i will not give up everything is easily solved but u just aint big enough r u?