First of all pack a class with claymores and Perk 1: One man army or One man army pro. Also make sure you have another class with C4.
Lay your claymore and then use one man army to get another one and lay that near it, you will now have two claymores in a line.
Now switch to your C4 class using One man army and place your C4 near your claymores.
When you are ready activate your C4, this will set of a chain reaction with the claymores hopefully killing your target.
You do not challenge Infinity Ward
Get into a challenge lobby.
challenge lobby
yes
Pick up someones gun and kill them with it
complete challenge "silent veteran II"
You have to get invited by a co-host or a host that hosts challenge lobbies
Do the challenge "Ultimate Sacrifice" which you unlock be nuking the enemy while you are losing
You have to get all of the attachments on the ACR to get the mastery.
Yes, but only when you unlock the challenge Flyswatter
Modern warfare reflex and modern warfare are the same. Modern warfare "reflex" means that its for wii. If its just modern warfare its for the other consoles
Challenge: "Counter-C4: I" - Kill 3 enemies by shooting C4.