The Daniel Defense M4Rail Hand guards are designed to give
the shooter the feel of the military issue M4 hand guard, with
many added advantages. They are "free floated" attached to the
upper to protect the barrel from stress and indexed to the barrel
nut with pins to eliminate the possibility of "hand guard spin".
Their hand guard ventilation holes and our gas tube cooling
holes provide maximum cooling for continuous fire situations.
With the shortest model weighing only 8.5 ounces, these hand
guards are great for shooters who are looking to lighten their
working load.