The following are instructions on how to install a Harris #5 Bipod Adapter and the Bipod on M4 dual heat shield handguards.
Make sure weapon is unloaded!
Separate upper from lower and remove handguards.
First remove the inner heat shield of the handguard that will be used on the bottom of the rifle using a pair of needle nosed pliers
Cut the forward most heat shield tabs off with wire cutters.
Place THE Harris #5 backing plate in handguard as shown with the screw hole lined up with the second vent hole in the handguard.
Screw bipod stud into the backing plate and tighten down as shown. Just tighten until snug. Do not over tighten as you may crack the handguard.
Unscrew the knurled knob on the bipod until the bipod locking tabs can be pushed through and separated enough to go around the bipod stud.
Tighten knurled knob on the bipod. The legs of the bipod should be pointed in the forward direction towards the muzzle.
Install the sling swivel provided with the Harris #5 on the bipod as shown.