Actually having spoken to many 'fobbits' it was peaches and cream to be 'inside' few firefights broke out inside the perimeter...
And I seriously doubt you know anything about stress marksmanship. It means actually training under highly stressful conditions or engaging in select fire with high percentages of first round hits. Not what the 60 is known for. Most of my time on the pig was 'playing' not in a fire fight. many non infantry units barely fire the crew serves more than twice a year. The army I was in didn't put fire team leaders on the crew served weapons (E5)
MP isn't any better trained than a cop when it comes to marksmanship. When anyone has bad hit ratios at night and 'civilians' complain about it, I know they have never tried to fire even on a one way range at night with a pistol. Night shoots under flashlight, overheads and diffused light are eye openers.