Claymores can be a very effective weapon, you just have to know how to use them right. And if you are going to try and use them right, i wont help for explosives. When I did it I would use it like i was C4 hopping, i.e. find someone, thow a claymore at them and then run like hell. The claymore then triggers, and the next person who moves arround it dies (hopefully this is the guy that killed you). The way this usually works is you die, and you sit there waiting for a kill to pop up. I got Basic and Vet the same round with this, first try. Again, i got lucky, but it works. I was on a full 64/64 karkand as MEC. You get alot of kills when everyone is first rushing in, and if the Hotel flag ever goes down, just run in and chuck some claymores at the guys, it will work just the same. If you are lucky Hotel will never be capped, this is when it is easiest to get kills.