Modern Warfare 2 Help: Best weapons/perks for level prestige 25?

I just pick one weapon and max it out then I pick another. Right now my weapon of choice is the FMAMS, it only shoots in about 6 round bursts but it takes um out in one shot. But it’s a weapon you can’t just run thru the level with you have to be good and quick at aiming. And most the time I only use the red dot sight. It does the same thing as the holograph but the dots much smaller. And marathon with sleight of hand. And claymores I just put them where ever I’m running. Most likely every one runs in the same area ya know. And its lees expected. And when I’m dyeing a lot and I get frustrated I use the mg4, when you have to absolutely mow down every one in a room. You have to run for cover when you re load but it’s a 100 round clip. I had a 40 kills with that once. P90s another good one more of a close weapon but it shoots a but load of ammo and it reloads fast. Grate game