It's hard to kill them but it is pretty easy when you play it alot i got addicted,when i started killing them about 4 games then you got addicted as you would know. now the 4 ways to kill them. 1-Trapped If you are trapped you should chuck a bomb that makes them so they cannot see or look, i dont know what it is called and then you need to run past and then you will be out. 2-On the floor (Multiplayer) It is good when you are on the floor you must be thinking im a am a bit made but when you are on the floor with multiplayer you shuld shoot them in the back with a pistol and they die easly this is a nother way to kill them 3-Sniper shots and big guns It is easier with a sniper than with one of the big guns shoot them in the head and wih the big guns you do the same but more times. 4-Claymores and C4 claymores and c4 are good too i was playing with a friend and i put lots of claymores and c4 in a row and the juggernauts ran and i prest the c4 button and it killed him. thanks for youre time