Adding a Free Float Rail to your rifle requires some amount of work. Troy Industries makes a free float quad rail that all you have to do is remove your front sight assembly and end cap since it fits onto your standard Barrel Nut which your rifle has. And reinstall your front sight assembly and Gas Tube. But if you were to go with a YHM Quad for example it would require the removal of your front sight and gas tune, end cap and Barrel Nut. The New Barrel Nut that comes with the YHM Quad Rail for example which would replace the standard barrel nut, would have to be aligned for the gas tube and torqued to a minimum of 35 ft. lbs. You would have to have a Barrel Nut Wrench. So my suggestion is to get a two piece quad rail like a Surefire M-73 for CAR Rifles or M-85 for Mid Length Rifles or another brand. The Troy Free Float would not be that difficult to put on since it would not require the removal of your existing Barrel Nut on your rifle.
The Constitution is not an instrument for the Government to restrain the people. It is an instrument for the people to restrain the Government!
“Americans have the right and advantage of being armed. Unlike the people of other countries, whose leaders are afraid to trust them with arms.”
James Madison. Author of the 2nd Amendment