if someone is around you, circle the spot where they are, be the patient person mate, impatient people suck at SnD, thats my best game type, went 22-1 today in it, i only died because my care package killed me, also use sleight of hand, stopping power, and ninja pro on snipers, for SMG's use marathon instead of sleight of hand, if silencing a weapon, use a silenced side arm, i recommend the FAMAS, UMP45, P90 and ACR for search and destroy, i sometimes use the SCAR, i avoid sniping as i usually get found by some guy using lightweight, for smaller more enclosed maps like karachi, use an SMG, for open maps use a silenced assault rifle, i recommend the ACR, TAR or SCAR silenced, an open map is wasteland for example, for a map like invasion where its spread out a little but not really enclosed like karachi, use a non silenced assault rifle, i never use cold blooded and never shoot stuff down as its a waste of a class, avoid one man army as changing class takes quite a while,
Hope i helped jamie