Thanks Johan762.
And one other thing to remember depending on your locale the range of engagement may be reduced to short visibility-forests, city streets, enemy wearing camoflage uniforms (it becomes difficult to see someone in a camoflage uniform out past about 250M moving tactically in most cases), in a desert depending on mirage conditions you may not see more than 200M. In a forest usually engagment range is 75M and closer and you would be in serious trouble with a semi-automatic vs. full automatic fire at point blank. usually the minmum you would run into on foot would be a squad 8-12 men armed with some form of assault rifle, SAW and or GPMG, perhaps a grenade launcher, and usually some form of rocket launcher.
I am not saying to fight would be impossible-I am just saying fight with discretion, they advance you retreat- they retreat you harass. holding ground is something best left to an organized unit-unless you have no choice.