Knox's Rules:
Rule #1
Don't get shot
Rule #2
Short, controlled bursts
Rule #3
You discovered what Knox's Rule #3 is
Rule #4
Watch your bullet drop
Rule #5
Patch your wounds
Rule #6
Keep a full mag
Rule #7
If in doubt, fall back
Rule #8
Keep the enemy suppressed
Rule #9
Orders
Rule #10
Beware of confined spaces