Execelent. Here's some tips.
Great game, but im sure some people need more reviews like jorzza did below. Here's mine.
first if you want power and accuracy use the kimber. but if u want that high cap mag and full auto the glock gives u that's a good choice. next buy the lam. that will help u get headshots for fast kills. if you have the glock then get the high cap mag, then full auto. do not get the mac. low damge low mag cap. the m9 is low damage and ditto to the p226. the kimber and usp have similar stats with the usp being more accurate and mobile. the glock is auto now if you are a slow reflex, then save up for the ump. good acuracy and damage. u just need the laser and the grip. no sight recomended. or jump to the ar's if you r fast reflex. i suggest the scar, m4, or g36. scar has high damage and accuracy. m4 is good fire rate and accuracy. and the g36 is all around. the m14 is the best damage and accuracy but low mag cap. the ak will get weak fast. and the l85 does not have much attachments. use the shooting range in the briefing menu. helps with aim USE GRENADES. kill trucks in one blast. use the a10 at 300 instead of 150. it takes awhile to get there and i suspect you have a crapload of enemies to deal with. also get the ammo clips and vests. the delta sniper is ok but dies fast don't waste money on him. also the repair button is sliding the little bar across. oh and use semi-auto. i know its one round per click but click fast. semi is more accurate. i went up 5 waves like this. that should sum it up. HAPPY HUNTING!!! :)